EP3283524B1 - Bispecific antibody constructs for cdh3 and cd3 - Google Patents

Bispecific antibody constructs for cdh3 and cd3 Download PDF

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EP3283524B1
EP3283524B1 EP16716617.2A EP16716617A EP3283524B1 EP 3283524 B1 EP3283524 B1 EP 3283524B1 EP 16716617 A EP16716617 A EP 16716617A EP 3283524 B1 EP3283524 B1 EP 3283524B1
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depicted
cdr
cancer
human
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EP3283524A1 (en
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Bertram Weiss
Anna-Lena Frisk
Ruprecht ZIERZ
Peter Kufer
Tobias Raum
Doris Rau
Jonas ANLAHR
Ralf Lutterbüse
Lisa NAHRWOLD
Christoph DAHLHOFF
Claudia BLÜMEL
Patrick Hoffmann
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Amgen Research Munich GmbH
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • A61P35/02—Antineoplastic agents specific for leukemia
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C07K16/2803—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily
    • C07K16/2809—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily against the T-cell receptor (TcR)-CD3 complex
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C07K16/30—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants from tumour cells
    • C07K16/3053—Skin, nerves, brain
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
    • C07K2317/31—Immunoglobulins specific features characterized by aspects of specificity or valency multispecific
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
    • C07K2317/33—Crossreactivity, e.g. for species or epitope, or lack of said crossreactivity
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
    • C07K2317/565—Complementarity determining region [CDR]
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/60—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments
    • C07K2317/62—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments comprising only variable region components
    • C07K2317/622—Single chain antibody (scFv)
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C07K2317/73—Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C07K2317/73—Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
    • C07K2317/732—Antibody-dependent cellular cytotoxicity [ADCC]
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/90—Immunoglobulins specific features characterized by (pharmaco)kinetic aspects or by stability of the immunoglobulin
    • C07K2317/92—Affinity (KD), association rate (Ka), dissociation rate (Kd) or EC50 value
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/90—Immunoglobulins specific features characterized by (pharmaco)kinetic aspects or by stability of the immunoglobulin
    • C07K2317/94—Stability, e.g. half-life, pH, temperature or enzyme-resistance

Definitions

  • the present invention relates to a bispecific single chain antibody construct comprising a first human binding domain which binds to an epitope clauster of human and macaque CDH3 on the surface of a target cell, and a second binding domain which binds to human CD3 on the surface of a T cell, wherein the epitope cluster of human CDH3 is comprised within amino acid positions 291-363 (SEQ ID NO: 36) of human CDH3 as depicted in SEQ ID NO: 1, wherein the binding domains have the following format: pairs of VH regions and VL regions in the format of an scFv, and wherein redirected lysis of target cells via the recruitment of T cells by the antibody construct involves cytolytic synapse formation and delivery of perforin and granzymes.
  • the invention provides a polynucleotide encoding the bispecific single chain antibody construct, a vector comprising said polynucleotide and a host cell transformed or transfected with said polynucleotide or vector. Furthermore, the invention provides a process for the production of the bispecific single chain antibody construct of the invention, a medical use of said bispecific single chain antibody construct and a kit comprising said bispecific single chain antibody construct.
  • cadherins encompasses more than 100 members in humans including the so called classical cadherins P-cadherin, E-cadherin, N-cadherin and R-cadherin, each of which is active in an individual set of tissues ( Takeichi M. Development, 102:639-55(1988 ), van Roy F., Nature Rev., V14:121-134 (2014 )). Cadherins inter alia play an essential role in the development of adult tissues and organs as well as in the homeostasis of various tissues ( Conacci-Sorrell M, et al., J Clin Invest, 109:987-91, (2002 )).
  • Cadherins are transmembrane glycoproteins that regulate cell-cell adhesion processes by the formation of calcium dependend junctions and by converting mechanical stimuli into electrochemical activity, a process referred to as mechanotrunsduction ( Gumbiner J. Cell. Biol., 148:399-404 (2000 ); Yagi, et al., Genes Dev., 14:1169-1180 (2000 , Parades et al. Biochimica et Biophysica Acta 1826, 297-311 (2012 )).
  • Placental cadherin also known as Calcium dependent cell-cell adhesion protein 3 (CDH3)
  • CDH3 ECD comprises five cadherin repeats, herein denominated as (extracellular) domains 1-5 / Dom1-Dom5 / D1-D5, each consisting of about 110 amino acids.
  • the proteins with the highest sequence homology to P-Cadherin are E-cadherin with a 53% sequence homology and N-cadherin with a 39% homology.
  • P-cadherin The expression level of P-cadherin is considered to be low in healthy adult individuals and to be limited to the basal or lower layers of stratified epithelia, including prostate and skin, breast myoepithelial cells ( Takeichi M. J Cell Biol 103:2649-58, (1986 ) and Shimoyama Y, et al., Cancer Res, 49:2128-33(1989 )). Although not being lethal in gene knockout mice, loss of P-cadherin function has been shown to be associated with developmental defects, as well as hyperplasia and dysplasia of the mammary epithelium. ( G.L. Radice et al. J. Cell Biol. 139: 1025-1032 (1997 )).
  • P-cadherin In contrast to the low gene expression level in healthy individuals, expression of P-cadherin is upregulated in the context of some diseases including, e.g. immune diseases like Crohn's disease and colitis ( Hardy, et al., Gut 50:513-519 (2002 )). In addition, P-cadherin is considered to play a significant role for the pro-invasive nature of cancer cells ( Furukawa, et al., Microscopy Res. Technique 38 (4):343-352 (1997 ), Parades et al. Clin Cancer Res. 11(16), 5869-5877 (2005 ), Parades et al. Biochimica et Biophysica Acta 1826, 297-311 (2012 )).
  • neoplasms rank second amongst the death-causing diseases in the category of non-communicable diseases, causing about 8.3 Million deaths in 2013 worldwide ( GBD 2013 Lancet 2015; 385: 117-71 ).
  • the absolute number of cancer cases has increased by 45.6 % since 1990 which can be attributed to the fact that the world population is increasing, that people get older and that the prevalence of established risk factors (e.g. smoking, overweight, physical inactivity) is also increasing ( GBD 2013 Lancet 2015; 385: 117-71 , Torre LA et al. CA Cancer J Clin. 2015; 65:87-108 ).
  • men lung cancer is the leading cause of death with an estimated number of about 1,1 Million cases per year followed by liver and stomach cancer.
  • Chemotherapeutic agents encompass nucleotide analogs like 5-flurouracil (5-FU), DNA damaging agents such as oxaliplatin and topoisomerase inhibitors like irinotecan or microtubule inhibitors such as docetaxel, which all lead to inhibition of tumor cell proliferation.
  • Targeted therapies include for example small molecule compounds which selectively inhibit mutated oncogenic kinases like the BRAF V600E selective compound vemurafenib ( Garbe C. et al Recent Results Cancer Res.
  • CDH3 in tumor cells provides the basis for a new approach to treat cancers, by using a bispecific antibody which recognizes CDH3 overexpressing tumor cells and kills them by redirection of cytotoxic T cells which are recognized be CD3 binding moiety of this antibody.
  • CDH3 In contrast to the elevated expression of CDH3 in tumor tissue its expression in normal tissue is low or not detectable (Milic et al., Imai et al, Taniuchi et al, Rocha et al, Dasgupta et al, Han et al, Patel., Kim et al, Sugiyma et al, Jarzab et al., human protein atlas). Taken together this provides evidence that CDH3 is a suitable target for the proposed bispecific antibody approach.
  • WO20010/001585 discloses anti-CDH3 antibodies conjugated with a radioisotope label.
  • an anti-cancer cell marker binding arm may be combined with an arm which binds to a triggering molecule on a leukocyte such as a T-cell receptor molecule (e.g. CD2 or CD3), or Fc receptors for IgG (FcyR), such as FcyRI (CD64), FcyRII (CD32) and FcyRIH (CD 16) so as to focus cellular defense mechanisms to the cancer cell or an arm which binds the cytotoxic agent (e.g.
  • a triggering molecule on a leukocyte such as a T-cell receptor molecule (e.g. CD2 or CD3), or Fc receptors for IgG (FcyR), such as FcyRI (CD64), FcyRII (CD32) and FcyRIH (CD 16) so as to focus cellular defense mechanisms to the cancer cell or an arm which binds
  • ADCC antibody-dependend cell cytotoxicity
  • antibodies can be conjugated to cytotoxic or cytostatic agents (e.g. a chemotherapeutic agent, a toxin, a radioactive isotope or the like) resulting in antibody-drug conjugates (ADCs), or broadly, immunoconjugates.
  • cytotoxic or cytostatic agents e.g. a chemotherapeutic agent, a toxin, a radioactive isotope or the like
  • ADCs antibody-drug conjugates
  • Immunoconjugates allow for the targeted delivery of a drug moiety to a tumor, and intracellular accumulation thereof.
  • the efficacy of such immunoconjugates with regard to the killing of tumor cells strongly depends on various parameters like the internalization behavior of the target molecule which is usually located in the cell membrane with an extracellular domain, as well as the mode of action of the respective immunoconjugate. Overall, coupling to an immunoconjugate has been shown to significantly enhance the anti-tumor efficacy of various antibodies.
  • bispecific molecules binding to the target molecule as well as to T cells have shown promising results circumventing many of the above mentioned drawbacks. These drug molecules do not rely on the complete blocking of the function of a target or on the proliferation state of a target cell since they do utilize the very effective natural killing effect of T cells.
  • bispecific molecules are the bispecific anti-target x anti-CD3 single chain antibody construts, which have previously been shown to mediate a T cell-related killing of the target cell with a very high efficiency, see e.g. Blinatumomab.
  • the efficiency of such molecules depends on multiple parameters on the target binding domain as well as on the T cell recruiting part of the bispecific molecule. Especially on the target binding part of the bispecific scFv molecule are unpredictable since they vary very strongly depending on the nature of the target molecule including its ternary as well as quaternary structure. Amongst the efficiency defining parameters the binding kinetics between the target- and the bispecific binding molecule as well as the exact binding region, the so called binding epitope play major roles.
  • Anti-CDH3 monoclonal antibodies as holds true generally for any other monoclonal antibodies - function by way of highly specific recognition of their target molecules. They recognize only a single site, or epitope, on their target CDH3 molecule. In addition, many antibodies have been found to exert their function in a species-specific manner. This species specificity however, inherent not only to CDH3 monoclonal antibodies (and fragments thereof), but to monoclonal antibodies in general, is a significant impediment to their development as therapeutic agents for the treatment of human diseases. In order to obtain market approval any new candidate medication must pass through rigorous testing.
  • Drug candidates can be tested for safety in animals in the following three ways, (i) in a relevant species, i.e. a species where the drug candidates can recognize the ortholog antigens, (ii) in a transgenic animal containing the human antigens and (iii) by use of a surrogate for the drug candidate that can bind the ortholog antigens present in the animal.
  • bispecific single chain antibodies described in the art have great therapeutic potential for the treatment of malignant diseases, most of these bispecific molecules are limited in that they are species specific and recognize only human antigen, and likely the primate i.e. macaque counterpart. Moreover, most of said bispecific molecules are further limited in that they fail to exert their desired function across species borders, such that they may recognize human and primate homologes but fail to exert, for instance, T cell-mediated cytotoxicity.
  • the present invention provides, in a first aspect, for a bispecific single chain antibody construct comprising a first preferably human binding domain which binds to an epitope cluster of human CDH3 on the surface of a target cell, wherein the first binding domain also binds to macaque CDH3, preferably to Macaca fascicularis CDH3, and comprising a second binding domain which binds to human CD3 on the surface of a T cell, wherein the epitope cluster of human CDH3 is comprised within amino acid positions 291-363 (SEQ ID NO: 36) of human CDH3 as depicted in SEQ ID NO: 1, wherein the binding domains have the following format: pairs of VH regions and VL regions in the format of an scFv, and wherein redirected lysis of target cells via the recruitment of T cells by the antibody construct involves cytolytic synapse formation and delivery of perforin and granzymes.
  • a bispecific single chain antibody construct comprising a first preferably human binding domain which binds to an
  • the bispecific antibody construct is characterized in that the first binding domain also binds preferably to Macaca fascicularis CDH3.
  • both the CD3 and the CDH3 binding domain of the CDH3xCD3 bispecific single chain antibody constructs of the invention are cross-species specific and functional, i.e. reactive with the human and macaque antigens exerting a comparable effect of T cell-mediated cytotoxicity, it can be used both for preclinical evaluation of safety, activity and/or pharmacokinetic profile of these binding domains in primates and - in the identical form - as drug in humans.
  • the cross-species specificity of the first and second binding domain of the antibody constructs of the invention is identical.
  • the need to construct a surrogate CDH3xCD3 bispecific single chain antibody construct for testing in a phylogenetic distant (from humans) species disappears.
  • the identical molecule can be used in animal preclinical testing as is intended to be administered to humans in clinical testing as well as following market approval and therapeutic drug administration.
  • the ability to use the same molecule for preclinical animal testing as in later administration to humans virtually eliminates, or at least greatly reduces, the danger that the data obtained in preclinical animal testing have limited applicability to the human case.
  • obtaining preclinical safety data in animals using the same molecule as will actually be administered to humans does much to ensure the applicability of the data to a human-relevant scenario.
  • surrogate molecules In contrast, in conventional approaches using surrogate molecules, said surrogate molecules have to be molecularly adapted to the animal test system used for preclinical safety assessment.
  • the molecule to be used in human therapy in fact differs in sequence and also likely in structure from the surrogate molecule used in preclinical testing in pharmacokinetic parameters and/or biological activity, with the consequence that data obtained in preclinical animal testing have limited applicability I transferability to the human case.
  • the use of surrogate molecules requires the construction, production, purification and characterization of a completely new construct. This leads to additional development costs and time necessary to obtain that molecule.
  • surrogates have to be developed separately in addition to the actual drug to be used in human therapy, so that two lines of development for two molecules have to be carried out.
  • a major advantage of the preferably human, CDH3xCD3 bispecific single chain antibody construct of the invention exhibiting cross-species specificity and functionality (i.e. reactivity) described herein is that the identical molecule can be used for therapeutic agents in humans and in preclinical animal testing.
  • CDH3xCD3 bispecific single chain antibody construct of the invention it is also no longer necessary to adapt the test animal to the drug candidate intended for administration to humans, such as e.g. the creation of transgenic animals.
  • The, preferably human, CDH3xCD3 bispecific single chain antibody construct of the invention exhibiting cross-species specificity and reactivity according to the uses and the methods of invention can be directly used for preclinical testing in non-chimpanzee primates like macaques, without any genetic manipulation of the animals.
  • approaches in which the test animal is adapted to the drug candidate always bear the risk that the results obtained in the preclinical safety testing are less representative and predictive for humans due to the modification of the animal.
  • the proteins encoded by the transgenes are often highly over-expressed.
  • data obtained for the biological activity of an antibody against this protein antigen may be limited in their predictive value for humans in which the protein is expressed at much lower, more physiological levels.
  • a further advantage of the preferably human, CDH3xCD3 bispecific single chain antibody construct of the invention is the ability of extracting multiple blood samples when using it as part of animal preclinical testing, for example in the course of pharmacokinetic animal studies. Multiple blood extractions can be much more readily obtained with a non-chimpanzee primate than with lower animals, e.g. a mouse.
  • the extraction of multiple blood samples allows continuous testing of blood parameters for the determination of the biological effects induced by the CDH3xCD3 bispecific single chain antibody construct of the invention.
  • the extraction of multiple blood samples enables the researcher to evaluate the pharmacokinetic profile of the, preferably human, CDH3xCD3 bispecific single chain antibody construct of the invention as defined herein.
  • potential side effects which may be induced by said CDH3xCD3 bispecific single chain antibody construct of the invention reflected in blood parameters can be measured in different blood samples extracted during the course of the administration of said antibody.
  • CDH3xCD3 bispecific single chain antibody construct of the invention as defined herein exhibiting cross-species specificity may be briefly summarized as follows: First, the CDH3xCD3 bispecific single chain antibody construct of the invention as defined herein used in preclinical testing is the same as the one used in human therapy. Thus, it is no longer necessary to develop two independent molecules, which may differ in their pharmacokinetic properties and biological activity. This is highly advantageaus in that e.g. the pharmacokinetic results are more directly transferable and applicable to the human setting than e.g. in conventional surrogate approaches.
  • CDH3xCD3 bispecific single chain antibody construct of the invention as defined herein for the preparation of therapeutics in human is less cost- and labor-intensive than surrogate approaches.
  • CDH3xCD3 bispecific single chain antibody construct of the invention as defined herein can be used for preclinical testing not only in one primate species, but in a series of different primate species, thereby limiting the risk of potential species differences between primates and human.
  • the generation of an immune reaction against said binding molecules is minimalized when administered to human patients.
  • Induction of an immune response with antibodies specific for a drug candidate derived from a non-human species as e.g. a mouse leading to the development of human-anti-mouse antibodies (HAMAs) against therapeutic molecules of murine origin is excluded.
  • the therapeutic use of the CDH3xCD3 bispecific single chain antibody construct of the invention provides a novel and inventive therapeutic approach for cancer, preferably solid tumors, more preferably carcinomas and other cancer indications as listed below.
  • the CDH3xCD3 bispecific single chain antibody construct of the invention provides an advantageaus tool in order to kill CDH3-expressing human cancer cells.
  • the cytotoxic activity of the CDH3xCD3 bispecific single chain antibody constructs of the invention provides an advantageous mode of action compared with classical (monospecific) IgG molecules or ADCs.
  • the target binding part of the bispecific single chain antibody construct specifically binds to P cadherin and none of its above described closest homologs, or other proteins present int the body.
  • Bispecific single chain antibody constructs of the present invention preferably do not bind to the CHD3 extracellular domain D1 (positions 108-215 of SEQ ID NO: 1), they preferably do not bind to the CHD3 extracellular domain D4 (positions 441-546 of SEQ ID NO: 1), and they preferably do not bind to the CHD3 extracellular domain D5 (positions 547-650 of SEQ ID NO: 1).
  • the bispecific single chain antibody construct is characterized in that the first human binding domain binds to an epitope which is comprised within amino acid positions 291-327 (SEQ ID NO: 34) of human CDH3 as depicted in SQ ID NO: 1, wherein the binding domains have the following format: pairs of VH regions and VL regions in the format of an scFv, and wherein redirected lysis of target cells via the recruitment of T cells by the antibody construct involves cytolytic synapse formation and delivery of perforin and granzymes.
  • the antibodies binding specifically to amino acid positions 291-327 (SEQ ID NO: 34), preferably do not bind to the CHD3 extracellular domain D3 of human CDH3 (positions 328-440 of SEQ ID NO: 1).
  • a preferred antibody construct according to the invention can also be defined as a bispecific single chain antibody construct comprising a first human binding domain which binds to an epitope of human and macaque CDH3 on the surface of a target cell and a second binding domain which binds to human CD3 on the surface of a T cell, wherein the binding domains have the following format: pairs of VH regions and VL regions in the format of an scFv, and wherein redirected lysis of target cells via the recruitment of T cells by the antibody construct involves cytolytic synapse formation and delivery of perforin and granzymes, wherein the bispecific single chain antibody construct binds to the same epitope as or competes for binding to CDH3 with the antibody denominated CDH3-11, CDH3-12, CDH3-13 or CDH3-14, i.e., the antibody comprising:
  • the bispecific antibody construct is characterized in that the first binding domain binds to an epitope which is comprised within amino acid positions 328-363 (SEQ ID NO: 35) of human CDH3 as depicted in SEQ ID NO: 1, wherein the first binding domain preferably also binds to an epitope which is comprised within amino acid positions 404-440 (SEQ ID NO: 390) of human CDH3 as depicted in SEQ ID NO: 1, wherein the binding domains have the following format: pairs of VH regions and VL regions in the format of an scFv, and wherein redirected lysis of target cells via the recruitment of T cells by the antibody construct involves cytolytic synapse formation and delivery of perforin and granzymes.
  • a preferred bispecific single chain antibody construct according to the invention can also be defined as a bispecific single chain antibody construct comprising a first human binding domain which binds to an epitope of human and macaque CDH3 on the surface of a target cell and a second binding domain which binds to human CD3 on the surface of a T cell, wherein the binding domains have the following format: pairs of VH regions and VL regions in the format of an scFv, and wherein redirected lysis of target cells via the recruitment of T cells by the antibody construct involves cytolytic synapse formation and delivery of perforin and granzymes, wherein the bispecific single chain antibody construct binds to the same epitope as or competes for binding to CDH3 with the antibody denominated CDH3-24, i.e., the antibody comprising a VH region as depicted in SEQ ID NO: 285 and a VL region as depicted in SEQ ID NO: 286.
  • Another preferred bispecific single chain antibody construct according to the invention can also be defined as a bispecific single chain antibody construct comprising a first human binding domain which binds to an epitope of human or macaque CDH3 on the surface of a target cell and a second binding domain which binds to human CD3 on the surface of a T cell, wherein the antibody construct binds to the same epitope as or competes for binding to CDH3 with the bispecific single chain antibody construct denominated CDH3-25, CDH3-26 or CDH3-27, i.e., the bispecific single chain antibody construct comprising:
  • an bispecific single chain antibody construct competes for binding with another given antibody construct can be measured in a competition assay such as a competitive ELISA or a cell-based competition assay.
  • Avidin-coupled microparticles can also be used. Similar to an avidin-coated ELISA plate, when reacted with a biotinylated protein, each of these beads can be used as a substrate on which an assay can be performed. Antigen is coated onto a bead and then precoated with the first antibody. The second antibody is added and any additional binding is determined. Readout occurs via flow cytometry.
  • the bispecific single chain antibody construct is characterized in that the first binding domain binds to an epitope which is comprised within amino acid positions 328-363 (SEQ ID NO: 35) of human CDH3 as depicted in SEQ ID NO: 1 and to an epitope which is comprised within amino acid positions 404-440 (SEQ ID NO: 390) of human CDH3 as depicted in SEQ ID NO: 1.
  • bispecific single chain antibody constructs of the present invention do not bind to an epitope which is comprised within amino acid positions 216-252 or 253-290 of human CDH3 as depicted in SEQ ID NO: 1.
  • the antibody constructs of the present invention do not bind to an epitope which is comprised within amino acid positions 364-403 of human CDH3 as depicted in SEQ ID NO: 1.
  • One advantage of the present invention is the provision of a bispecific single chain antibody construct comprising a binding domain which binds to human CD3 and a binding domain capable of binding to human CDH3, whereas both binding domains exhibit a cross-species specificity to human and macaque CDH3.
  • the CDH3xCD3 bispecific single chain antibody constructs of the invention not only specifically bind to the human and the macaque CDH3 homologes of CDH3 and CD3, but also exert T cell-mediated cytotoxicity, in human and macaque CDH3 assay systems.
  • the present invention provides CDH3xCD3 bispecific single chain antibody constructs that show T cell-mediated cytotoxicity in human and macaque.
  • CDH3xCD3 bispecific single chain antibody constructs that bind to an epitope cluster comprised within amino acid positions 291-363 (SEQ ID NO: 36) of human CDH3 as depicted in SEQ ID NO: 1, wherein the binding domains have the following format: pairs of VH regions and VL regions in the format of an scFv, and wherein redirected lysis of target cells via the recruitment of T cells by the antibody construct involves cytolytic synapse formation and delivery of perforin and granzymes.
  • an antibody construct refers to a molecule in which the structure and/or function is/are based on the structure and/or function of an antibody, e.g., of a full-length or whole immunoglobulin molecule, wherein the binding domains have the following format: pairs of VH regions and VL regions in the format of an scFv.
  • An antibody construct is hence capable of binding to its specific target or antigen.
  • an antibody construct according to the invention comprises the minimum structural requirements of an antibody which allow for the target binding. This minimum requirement may e.g. be defined by the presence of at least the three light chain CDRs (i.e. CDR1, CDR2 and CDR3 of the VL region) and/or the three heavy chain CDRs (i.e.
  • the antibodies on which the constructs according to the invention are based include for example monoclonal, recombinant, chimeric, deimmunized, humanized and human antibodies.
  • antibody constructs are single chain immunoglobulin antibodies generated by biotechnological or protein engineering methods or processes. Also within the definition of “antibody constructs” are fragments of full-length antibodies, such as VH, VHH, VL, (s)dAb, Fv, Fd, Fab, Fab', F(ab')2 or "r IgG" ("half antibody”).
  • Antibody constructs according to the invention may also be modified fragments of antibodies, also called antibody variants, such as scFv, di-scFv or bi(s)-scFv, scFv-Fc, scFv-zipper, scFab, Fab2, Fab3, diabodies, single chain diabodies, tandem diabodies (Tandab's), tandem di-scFv, tandem tri-scFv, "minibodies” exemplified by a structure which is as follows: (VH-VL-CH3) 2 , (scFv-CH3) 2 , ((scFv) 2 -CH3 + CH3), ((scFv) 2 -CH3) or (scFv-CH3-scFv) 2 , multibodies such as triabodies or tetrabodies, and single domain antibodies such as nanobodies or single variable domain antibodies comprising merely one variable domain, which might be VHH, VH or VL, that
  • antibody constructs includes monovalent, bivalent and polyvalent / multivalent constructs and, thus, monospecific constructs, specifically binding to only one antigenic structure, as well as bispecific and polyspecific / multispecific constructs, which specifically bind more than one antigenic structure, e.g. two, three or more, through distinct binding domains.
  • antibody constructs refers to molecules consisting of only one polypeptide chain .
  • the bispecific single chain antibody constructs of the present invention are preferably "in vitro generated antibody constructs".
  • This term refers to an bispecific single chain antibody construct according to the above definition where all or part of the variable region (e.g., at least one CDR) is generated in a non-immune cell selection, e.g., an in vitro phage display, protein chip or any other method in which candidate sequences can be tested for their ability to bind to an antigen.
  • a non-immune cell selection e.g., an in vitro phage display, protein chip or any other method in which candidate sequences can be tested for their ability to bind to an antigen.
  • a "recombinant antibody” is an antibody made through the use of recombinant DNA technology or genetic engineering.
  • mAb monoclonal antibody
  • monoclonal antibody construct refers to an antibody obtained from a population of substantially homogeneous antibodies, i.e., the individual antibodies comprising the population are identical except for possible naturally occurring mutations and/or post-translation modifications (e.g., isomerizations, amidations) that may be present in minor amounts.
  • Monoclonal antibodies are highly specific, being directed against a single antigenic site or determinant on the antigen, in contrast to conventional (polyclonal) antibody preparations which typically include different antibodies directed against different determinants (or epitopes).
  • the monoclonal antibodies are advantageous in that they are synthesized by the hybridoma culture, hence uncontaminated by other immunoglobulins.
  • the modifier "monoclonal” indicates the character of the antibody as being obtained from a substantially homogeneous population of antibodies, and is not to be construed as requiring production of the antibody by any particular method.
  • monoclonal antibodies for the preparation of monoclonal antibodies, any technique providing antibodies produced by continuous cell line cultures can be used.
  • monoclonal antibodies to be used may be made by the hybridoma method first described by Koehler et al., Nature, 256: 495 (1975 ), or may be made by recombinant DNA methods (see, e.g., U.S. Patent No. 4,816,567 ).
  • further techniques to produce human monoclonal antibodies include the trioma technique, the human B-cell hybridoma technique ( Kozbor, Immunology Today 4 (1983), 72 ) and the EBV-hybridoma technique ( Cole et al., Monoclonal Antibodies and Cancer Therapy, Alan R. Liss, Inc. (1985), 77-96 ).
  • Hybridomas can then be screened using standard methods, such as enzyme-linked immunosorbent assay (ELISA) and surface plasmon resonance (BIACORE TM ) analysis, to identify one or more hybridomas that produce an antibody that specifically binds with a specified antigen.
  • ELISA enzyme-linked immunosorbent assay
  • BIACORE TM surface plasmon resonance
  • Any form of the relevant antigen may be used as the immunogen, e.g., recombinant antigen, naturally occurring forms, any variants or fragments thereof, as well as an antigenic peptide thereof.
  • BIAcore Surface plasmon resonance as employed in the BIAcore system can be used to increase the efficiency of phage antibodies which bind to an epitope of a target antigen, such as CDH3 or CD3 epsilon ( Schier, Human Antibodies Hybridomas 7 (1996), 97-105 ; Malmborg, J. Immunol. Methods 183 (1995), 7-13 ).
  • a target antigen such as CDH3 or CD3 epsilon
  • Another exemplary method of making monoclonal antibodies includes screening protein expression libraries, e.g., phage display or ribosome display libraries.
  • Phage display is described, for example, in Ladner et al., U.S. Patent No. 5,223,409 ; Smith (1985) Science 228:1315-1317 , Clackson et al., Nature, 352: 624-628 (1991 ) and Marks et al., J. Mol. Biol., 222: 581-597 (1991 ).
  • the relevant antigen can be used to immunize a non-human animal, e.g., a rodent (such as a mouse, hamster, rabbit or rat).
  • the non-human animal includes at least a part of a human immunoglobulin gene.
  • antigen-specific monoclonal antibodies derived from the genes with the desired specificity may be produced and selected. See, e.g., XENOMOUSE TM , Green et al. (1994) Nature Genetics 7:13-21 , US 2003-0070185 , WO 96/34096 , and WO 96/33735 .
  • a monoclonal antibody can also be obtained from a non-human animal, and then modified, e.g., humanized, deimmunized, rendered chimeric etc., using recombinant DNA techniques known in the art.
  • modified antibody constructs include humanized variants of non-human antibodies, "affinity matured” antibodies (see, e.g . Hawkins et al. J. Mol. Biol. 254, 889-896 (1992 ) and Lowman et al., Biochemistry 30, 10832- 10837 (1991 )) and antibody mutants with altered effector function(s) (see, e.g ., US Patent 5,648,260 , Kontermann and Dübel (2010), loc. cit. and Little (2009), loc. cit. ) .
  • affinity maturation is the process by which B cells produce antibodies with increased affinity for antigen during the course of an immune response. With repeated exposures to the same antigen, a host will produce antibodies of successively greater affinities.
  • the in vitro affinity maturation is based on the principles of mutation and selection. The in vitro affinity maturation has successfully been used to optimize antibodies, antibody constructs, and antibody fragments. Random mutations inside the CDRs are introduced using radiation, chemical mutagens or error-prone PCR. In addition, the genetical diversity can be increased by chain shuffling. Two or three rounds of mutation and selection using display methods like phage display usually results in antibody fragments with affinities in the low nanomolar range.
  • a preferred type of an amino acid substitutional varianation of the bispecific single chain antibody constructs involves substituting one or more hypervariable region residues of a parent antibody (e. g. a humanized or human antibody).
  • a parent antibody e. g. a humanized or human antibody
  • the resulting variant(s) selected for further development will have improved biological properties relative to the parent antibody from which they are generated.
  • a convenient way for generating such substitutional variants involves affinity maturation using phage display. Briefly, several hypervariable region sites (e. g. 6-7 sites) are mutated to generate all possible amino acid substitutions at each site.
  • the antibody variants thus generated are displayed in a monovalent fashion from filamentous phage particles as fusions to the gene III product of M13 packaged within each particle.
  • the phage-displayed variants are then screened for their biological activity (e. g. binding affinity) as herein disclosed.
  • alanine scanning mutagenesis can be performed to identify hypervariable region residues contributing significantly to antigen binding.
  • Such contact residues and neighbouring residues are candidates for substitution according to the techniques elaborated herein.
  • the monoclonal bispecfic single chain antibody constructs of the present invention specifically include "chimeric" antibodies (immunoglobulins) in which a portion of the heavy and/or light chain is identical with or homologous to corresponding sequences in antibodies derived from a particular species or belonging to a particular antibody class or subclass, while the remainder of the chain(s) is/are identical with or homologous to corresponding sequences in antibodies derived from another species or belonging to another antibody class or subclass, as well as fragments of such antibodies, so long as they exhibit the desired biological activity ( U.S. Patent No. 4,816,567 ; Morrison et al., Proc. Natl. Acad. Sci. USA, 81: 6851-6855 (1984 )).
  • chimeric antibodies immunoglobulins
  • Chimeric antibodies of interest herein include "primitized" antibodies comprising variable domain antigen-binding sequences derived from a non-human primate (e.g., Old World Monkey, Ape etc.) and human constant region sequences.
  • a non-human primate e.g., Old World Monkey, Ape etc.
  • human constant region sequences e.g., human constant region sequences.
  • a variety of approaches for making chimeric antibodies have been described. See e.g., Morrison et al., Proc. Natl. Acad. ScL U.S.A. 81:6851 , 1985 ; Takeda et al., Nature 314:452, 1985 , Cabilly et al., U.S. Patent No. 4,816,567 ; Boss et al., U.S. Patent No. 4,816,397 ; Tanaguchi et al., EP 0171496 ; EP 0173494 ; and GB 2177096
  • a bispecific single chain antibody construct may also be modified by specific deletion of human T cell epitopes (a method called "deimmunization") by the methods disclosed for example in WO 98/52976 or WO 00/34317 . Briefly, the heavy and light chain variable domains of an antibody can be analyzed for peptides that bind to MHC class II; these peptides represent potential T cell epitopes (as defined in WO 98/52976 and WO 00/34317 ).
  • peptide threading For detection of potential T cell epitopes, a computer modeling approach termed "peptide threading" can be applied, and in addition a database of human MHC class II binding peptides can be searched for motifs present in the VH and VL sequences, as described in WO 98/52976 and WO 00/34317 . These motifs bind to any of the 18 major MHC class II DR allotypes, and thus constitute potential T cell epitopes. Potential T cell epitopes detected can be eliminated by substituting small numbers of amino acid residues in the variable domains, or preferably, by single amino acid substitutions.
  • Humanized antibodies are antibodies or immunoglobulins of mostly human sequences, which contain (a) minimal sequence(s) derived from non-human immunoglobulin.
  • humanized antibodies are human immunoglobulins (recipient antibody) in which residues from a hypervariable region (also CDR) of the recipient are replaced by residues from a hypervariable region of a non-human (e.g., rodent) species (donor antibody) such as mouse, rat, hamster or rabbit having the desired specificity, affinity, and capacity.
  • donor antibody such as mouse, rat, hamster or rabbit having the desired specificity, affinity, and capacity.
  • Fv framework region (FR) residues of the human immunoglobulin are replaced by corresponding non-human residues.
  • "humanized antibodies” as used herein may also comprise residues which are found neither in the recipient antibody nor the donor antibody. These modifications are made to further refine and optimize antibody performance.
  • the humanized antibody may also comprise at least a portion of an immunoglobulin constant region (Fc), typically that of a human immunoglobulin.
  • Fc immunoglobulin constant region
  • Humanized antibodies or fragments thereof can be generated by replacing sequences of the Fv variable domain that are not directly involved in antigen binding with equivalent sequences from human Fv variable domains.
  • Exemplary methods for generating humanized antibodies or fragments thereof are provided by Morrison (1985) Science 229:1202-1207 ; by Oi et al. (1986) BioTechniques 4:214 ; and by US 5,585,089 ; US 5,693,761 ; US 5,693,762 ; US 5,859,205 ; and US 6,407,213 .
  • Those methods include isolating, manipulating, and expressing the nucleic acid sequences that encode all or part of immunoglobulin Fv variable domains from at least one of a heavy or light chain.
  • nucleic acids may be obtained from a hybridoma producing an antibody against a predetermined target, as described above, as well as from other sources.
  • the recombinant DNA encoding the humanized antibody molecule can then be cloned into an appropriate expression vector.
  • Humanized antibodies may also be produced using transgenic animals such as mice that express human heavy and light chain genes, but are incapable of expressing the endogenous mouse immunoglobulin heavy and light chain genes.
  • Winter describes an exemplary CDR grafting method that may be used to prepare the humanized antibodies described herein ( U.S. Patent No. 5,225,539 ). All of the CDRs of a particular human antibody may be replaced with at least a portion of a non-human CDR, or only some of the CDRs may be replaced with non-human CDRs. It is only necessary to replace the number of CDRs required for binding of the humanized antibody to a predetermined antigen.
  • a humanized antibody can be optimized by the introduction of conservative substitutions, consensus sequence substitutions, germline substitutions and/or back mutations.
  • Such altered immunoglobulin molecules can be made by any of several techniques known in the art, ( e.g ., Teng et al., Proc. Natl. Acad. Sci. U.S.A., 80: 7308-7312, 1983 ; Kozbor et al., Immunology Today, 4: 7279, 1983 ; Olsson et al., Meth. Enzymol., 92: 3-16, 1982 , and EP 239 400 ).
  • human antibody includes antibodies, antibody constructs and binding domains having antibody regions such as variable and constant regions or domains which correspond substantially to human germline immunoglobulin sequences known in the art, including, for example, those described by Kabat et al. (1991) ( loc. cit. ) .
  • the human antibodies, antibody constructs or binding domains of the invention may include amino acid residues not encoded by human germline immunoglobulin sequences (e.g ., mutations introduced by random or site-specific mutagenesis in vitro or by somatic mutation in vivo ), for example in the CDRs, and in particular, in CDR3.
  • human antibodies, antibody constructs or binding domains can have at least one, two, three, four, five, or more positions replaced with an amino acid residue that is not encoded by the human germline immunoglobulin sequence.
  • the definition of human antibodies, antibody constructs and binding domains as used herein also contemplates fully human antibodies, which include only non-artificially and/or genetically altered human sequences of antibodies as those can be derived by using technologies or systems such as the Xenomouse.
  • the bispecific single chain antibody constructs of the invention are “isolated” or “substantially pure” antibody constructs.
  • “isolated” or “substantially pure” when used to describe the antibody construct disclosed herein means an antibody construct that has been identified, separated and/or recovered from a component of its production environment.
  • the bispecific single chain antibody construct is free or substantially free of association with all other components from its production environment. Contaminant components of its production environment, such as that resulting from recombinant transfected cells, are materials that would typically interfere with diagnostic or therapeutic uses for the polypeptide, and may include enzymes, hormones, and other proteinaceous or non-proteinaceous solutes.
  • the bispecific single chain antibody constructs may e.g constitute at least about 5%, or at least about 50% by weight of the total protein in a given sample. It is understood that the isolated protein may constitute from 5% to 99.9% by weight of the total protein content, depending on the circumstances.
  • the polypeptide may be made at a significantly higher concentration through the use of an inducible promoter or high expression promoter, such that it is made at increased concentration levels.
  • the definition includes the production of an bispecific single chain antibody construct in a wide variety of organisms and/or host cells that are known in the art.
  • the bispecific single chain antibody construct will be purified (1) to a degree sufficient to obtain at least 15 residues of N-terminal or internal amino acid sequence by use of a spinning cup sequenator, or (2) to homogeneity by SDS-PAGE under non-reducing or reducing conditions using Coomassie blue or, preferably, silver stain.
  • an isolated bispecific single chain antibody construct will be prepared by at least one purification step.
  • binding domain characterizes in connection with the present invention a domain which (specifically) binds to / interacts with / recognizes a given target epitope or a given target site on the target molecules (antigens) CDH3 and CD3, respectively, wherein the binding domains have the following format: pairs of VH regions and VL regions in the format of an scFv.
  • the structure and function of the first binding domain (recognizing CDH3), and preferably also the structure and/or function of the second binding domain (CD3) is/are based on the structure and/or function of an antibody, e.g. of a full-length or whole immunoglobulin molecule.
  • the first human binding domain is characterized by the presence of three light chain CDRs (i.e. CDR1, CDR2 and CDR3 of the VL region) and three heavy chain CDRs (i.e. CDR1, CDR2 and CDR3 of the VH region).
  • the second binding domain also comprises the minimum structural requirements of an antibody which allow for the target binding.
  • the second binding domain comprises at least three light chain CDRs (i.e. CDR1, CDR2 and CDR3 of the VL region) and/or three heavy chain CDRs (i.e. CDR1, CDR2 and CDR3 of the VH region). It is envisaged that the first and/or second binding domain is produced by or obtainable by phage-display or library screening methods rather than by grafting CDR sequences from a pre-existing (monoclonal) antibody into a scaffold.
  • binding domains are in the form of polypeptides.
  • polypeptides may include proteinaceous parts and non-proteinaceous parts (e.g. chemical linkers or chemical cross-linking agents such as glutaraldehyde).
  • Proteins including fragments thereof, preferably biologically active fragments, and peptides, usually having less than 30 amino acids) comprise two or more amino acids coupled to each other via a covalent peptide bond (resulting in a chain of amino acids).
  • the term "polypeptide” as used herein describes a group of molecules, which usually consist of more than 30 amino acids. Polypeptides may further form multimers such as dimers, trimers and higher oligomers, i.e., consisting of more than one polypeptide molecule.
  • Polypeptide molecules forming such dimers, trimers etc. may be identical or non-identical.
  • the terms “peptide”, “polypeptide” and “protein” also refer to naturally modified peptides / polypeptides / proteins wherein the modification is effected e.g. by post-translational modifications like glycosylation, acetylation, phosphorylation and the like.
  • a “peptide”, “polypeptide” or “protein” when referred to herein may also be chemically modified such as pegylated. Such modifications are well known in the art and described herein below.
  • a binding domain according to the invention has the format an antibody heavy chain variable region (VH) and an antibody light chain variable region (VL) in the format of a scFv.
  • Fd fragments for example, have two VH regions and often retain some antigen-binding function of the intact antigen-binding domain.
  • Examples of (modified) antigen-binding antibody fragments include (1) a Fab fragment, a monovalent fragment having the VL, VH, CL and CH1 domains; (2) a F(ab')2 fragment, a bivalent fragment having two Fab fragments linked by a disulfide bridge at the hinge region; (3) an Fd fragment having the two VH and CH1 domains; (4) an Fv fragment having the VL and VH domains of a single arm of an antibody, (5) a dAb fragment ( Ward et al., (1989) Nature 341 :544-546 ), which has a VH domain; (6) an isolated complementarity determining region (CDR), and (7) a single chain Fv (scFv) , the latter being preferred (for example, derived from an scFV-library).
  • a Fab fragment a monovalent fragment having the VL, VH, CL and CH1 domains
  • a F(ab')2 fragment a bivalent fragment having two Fab
  • Examples for embodiments of antibody constructs according to the invention are e.g. described in WO 00/006605 , WO 2005/040220 , WO 2008/119567 , WO 2010/037838 , WO 2013/026837 , WO 2013/026833 , US 2014/0308285 , US 2014/0302037 , W O2014/144722 , WO 2014/151910 , and WO 2015/048272 .
  • the binding domain which binds to CDH3 and/or the binding domain which binds to CD3 is/are human binding domains.
  • Antibodies and antibody constructs comprising at least one human binding domain avoid some of the problems associated with antibodies or antibody constructs that possess non-human such as rodent (e.g . murine, rat, hamster or rabbit) variable and/or constant regions.
  • rodent e.g . murine, rat, hamster or rabbit
  • the presence of such rodent derived proteins can lead to the rapid clearance of the antibodies or antibody constructs or can lead to the generation of an immune response against the antibody or antibody construct by a patient.
  • human or fully human antibodies / antibody constructs can be generated through the introduction of human antibody function into a rodent so that the rodent produces fully human antibodies.
  • Fully human antibodies or antibody constructs are expected to minimize the immunogenic and allergic responses intrinsic to mouse or mouse-derivatized mAbs and thus to increase the efficacy and safety of the administered antibodies / antibody constructs.
  • the use of fully human antibodies or antibody constructs can be expected to provide a substantial advantage in the treatment of chronic and recurring human diseases, such as inflammation, autoimmunity, and cancer, which require repeated compound administrations.
  • the XenoMouse strains were engineered with yeast artificial chromosomes (YACs) containing 245 kb and 190 kb-sized germline configuration fragments of the human heavy chain locus and kappa light chain locus, respectively, which contained core variable and constant region sequences.
  • YACs yeast artificial chromosomes
  • the human Ig containing YACs proved to be compatible with the mouse system for both rearrangement and expression of antibodies and were capable of substituting for the inactivated mouse Ig genes. This was demonstrated by their ability to induce B cell development, to produce an adult-like human repertoire of fully human antibodies, and to generate antigen-specific human mAbs.
  • minilocus In an alternative approach, others, including GenPharm International, Inc., have utilized a "minilocus" approach. In the minilocus approach, an exogenous Ig locus is mimicked through the inclusion of pieces (individual genes) from the Ig locus. Thus, one or more VH genes, one or more DH genes, one or more JH genes, a mu constant region, and a second constant region (preferably a gamma constant region) are formed into a construct for insertion into an animal. This approach is described in U.S. Pat. No. 5,545,807 to Surani et al. and U.S. Pat. Nos.
  • Kirin has also demonstrated the generation of human antibodies from mice in which, through microcell fusion, large pieces of chromosomes, or entire chromosomes, have been introduced. See European Patent Application Nos. 773 288 and 843 961 .
  • Xenerex Biosciences is developing a technology for the potential generation of human antibodies.
  • SCID mice are reconstituted with human lymphatic cells, e.g., B and/or T cells. Mice are then immunized with an antigen and can generate an immune response against the antigen. See U.S. Pat. Nos. 5,476,996 ; 5,698,767 ; and 5,958,765 .
  • HAMA Human anti-mouse antibody
  • HACA human anti-chimeric antibody
  • binding domain interacts or specifically interacts with one or more, preferably at least two, more preferably at least three and most preferably at least four amino acids of an epitope located on the target protein or antigen (CDH3/ CD3), wherein the epitope cluster of human CDH3 is comprised within amino acid positions 291-363 (SEQ ID NO: 36) of human CDH3 as depicted in SEQ ID NO: 1.
  • epitope refers to a site on an antigen to which a binding domain, such as an antibody or immunoglobulin or derivative or fragment of an antibody or of an immunoglobulin, specifically binds.
  • a binding domain such as an antibody or immunoglobulin or derivative or fragment of an antibody or of an immunoglobulin
  • An “epitope” is antigenic and thus the term epitope is sometimes also referred to herein as “antigenic structure” or “antigenic determinant”.
  • the binding domain is an "antigen interaction site”. Said binding/interaction is also understood to define a "specific recognition”.
  • Epitopes can be formed both by contiguous amino acids or non-contiguous amino acids juxtaposed by tertiary folding of a protein.
  • a “linear epitope” is an epitope where an amino acid primary sequence comprises the recognized epitope.
  • a linear epitope typically includes at least 3 or at least 4, and more usually, at least 5 or at least 6 or at least 7, for example, about 8 to about 10 amino acids in a unique sequence, and can also be longer and comprise at least 15 or 20 amino acids, at least 25 or 30 amino acids, or even more.
  • a “conformational epitope”, in contrast to a linear epitope, is an epitope wherein the primary sequence of the amino acids comprising the epitope is not the sole defining component of the epitope recognized (e.g ., an epitope wherein the primary sequence of amino acids is not necessarily recognized by the binding domain).
  • a conformational epitope comprises an increased number of amino acids relative to a linear epitope.
  • the binding domain recognizes a three-dimensional structure of the antigen, preferably a peptide or protein or fragment thereof (in the context of the present invention, the antigen for one of the binding domains is comprised within the CDH3 protein).
  • a protein molecule folds to form a three-dimensional structure
  • certain amino acids and/or the polypeptide backbone forming the conformational epitope become juxtaposed enabling the antibody to recognize the epitope.
  • Methods of determining the conformation of epitopes include, but are not limited to, x-ray crystallography, two-dimensional nuclear magnetic resonance (2D-NMR) spectroscopy and site-directed spin labelling and electron paramagnetic resonance (EPR) spectroscopy.
  • 2D-NMR two-dimensional nuclear magnetic resonance
  • EPR electron paramagnetic resonance
  • the provided examples describe a further method to characterize a given binding domain, which includes a test whether the given binding domain binds to one or more epitope(s) of a given protein, in particular CDH3.
  • epitope cluster denotes epitopes lying in a defined contiguous stretch of an antigen, i.e. the epitope cluster of human CDH3 is comprised within amino acid positions 291-363 (SEQ ID NO: 36) of human CDH3 as depicted in SEQ ID NO: 1.
  • An epitope cluster can comprise one, two or more epitopes.
  • An antibody construct can also bind to an epitope within an epitope cluster and in addition to a further epitope outside of this cluster, which could then correspond to a discontinuous epitope.
  • a discontinuous epitope is usually characterized in that it encompasses amino acid stretches of the antigen that are not contiguous.
  • an antibody construct could bind to the extracellular subdomains D3A and D3C, but not to D3B.
  • the concept of "epitope clustering" is also used in the characterization of the features of the antibody constructs of the invention.
  • the epitope clusters and the epitopes that were defined - in the context of the present invention - in the extracellular domain of CDH3 are comprised within amino acid positions 291-363 (SEQ ID NO: 36) of human CDH3 as depicted in SEQ ID NO: 1 as described above and depicted in Figure 1 .
  • an extracellular domain (D1-D5) or a sub-domain (A, B, C) thereof in the human CDH3 protein is exchanged with the respective extracellular domain (D1-D5) or a sub-domain (A, B, C) thereof of a non-human and non-primate (e.g. chicken or mouse) CDH3 antigen (resulting in a construct comprising human CDH3, wherein one human extracellular domain or sub-domain thereof is replaced with its counterpart non-human extracellular domain or sub-domain thereof), a decrease in the binding of the binding domain will occur.
  • a non-human and non-primate e.g. chicken or mouse
  • Said decrease is preferably at least 10%, 20%, 30%, 40%, 50%; more preferably at least 60%, 70%, 80%, 90%, 95% or even 100% in comparison to the respective epitope cluster in the human CDH3 protein, whereby binding to the respective extracellular domain (D1-D5) or sub-domain thereof in the human CDH3 protein is set to be 100%.
  • the aforementioned human CDH3/ non-human CDH3 chimeras are expressed in CHO cells. It is also envisaged that the human CDH3/ non-human CDH3 chimeras are fused with a transmembrane domain and/or cytoplasmic domain of a different membrane-bound protein such as EpCAM.
  • a method to test this loss of binding due to exchange with the respective extracellular domain (D1-D5) or sub-domain thereof of a non-human (e.g ., mouse, but others like , rat, hamster, rabbit, chicken etc. might also be conceivable) CDH3 antigen is described in Example 2.
  • a further method to determine the contribution of a specific residue of a target antigen to the recognition by a antibody construct or binding domain is alanine scanning (see e.g. Morrison KL & Weiss GA. Cur Opin Chem Biol. 2001 Jun;5(3):302-7 ), where each residue to be analyzed is replaced by alanine, e.g. via site-directed mutagenesis.
  • Alanine is used because of its non-bulky, chemically inert, methyl functional group that nevertheless mimics the secondary structure references that many of the other amino acids possess. Sometimes bulky amino acids such as valine or leucine can be used in cases where conservation of the size of mutated residues is desired. Alanine scanning is a mature technology which has been used for a long period of time.
  • binding domain exhibits appreciable affinity for the epitope or epitope cluster on a particular protein or antigen (here: CDH3 and CD3, respectively) and, generally, does not exhibit significant reactivity with proteins or antigens other than CDH3 or CD3.
  • Appreciable affinity includes binding with an affinity of about 10 -6 M (KD) or stronger.
  • binding is considered specific when the binding affinity is about 10 -12 to 10 -8 M, 10 -12 to 10 -9 M, 10 -12 to 10 -10 M, 10 -11 to 10 -8 M, preferably of about 10 -11 to 10 -9 M.
  • a binding domain specifically reacts with or binds to a target can be tested readily by, inter alia, comparing the reaction of said binding domain with a target protein or antigen with the reaction of said binding domain with proteins or antigens other than CDH3 or CD3.
  • a binding domain of the invention does not essentially or substantially bind to proteins or antigens other than CDH3 or CD3 ( i.e ., the first binding domain is not capable of binding to proteins other than CDH3 and the second binding domain is not capable of binding to proteins other than CD3).
  • a binding domain of the present invention does not bind a protein or antigen other than CDH3 or CD3, i.e ., does not show reactivity of more than 30%, preferably not more than 20%, more preferably not more than 10%, particularly preferably not more than 9%, 8%, 7%, 6% or 5% with proteins or antigens other than CDH3 or CD3, whereby binding to CDH3 or CD3, respectively, is set to be 100%.
  • Specific binding is believed to be effected by specific motifs in the amino acid sequence of the binding domain and the antigen. Thus, binding is achieved as a result of their primary, secondary and/or tertiary structure as well as the result of secondary modifications of said structures.
  • the specific interaction of the antigen-interaction-site with its specific antigen may result in a simple binding of said site to the antigen.
  • the specific interaction of the antigen-interaction-site with its specific antigen may alternatively or additionally result in the initiation of a signal, e.g . due to the induction of a change of the conformation of the antigen, an oligomerization of the antigen, etc.
  • the present invention provides a bispecific single chain antibody construct comprising a first human binding domain which binds to human and macaque CDH3 on the surface of a target cell and a second binding domain which binds to human CD3 on the surface of a T cell, wherein the first binding domain comprises a VH region comprising CDR-H1, CDR-H2 and CDR-H3 and a VL region comprising CDR-L1, CDR-L2 and CDR-L3 selected from the group consisting of:
  • the present invention provides a bispecific single chain antibody construct comprising a first human binding domain which binds to human and macaque CDH3 on the surface of a target cell and a second preferably human binding domain which binds to human CD3 on the surface of a T cell, wherein the first binding domain comprises a VH region comprising CDR-H1, CDR-H2 and CDR-H3 and a VL region comprising CDR-L1, CDR-L2 and CDR-L3 selected from the group consisting of:
  • variable refers to the portions of the antibody or immunoglobulin domains that exhibit variability in their sequence and that are involved in determining the specificity and binding affinity of a particular antibody (i.e., the "variable domain(s)").
  • VH variable heavy chain
  • VL variable light chain
  • CH1 CH1
  • Each light (L) chain is linked to a heavy (H) chain by one covalent disulfide bond, while the two H chains are linked to each other by one or more disulfide bonds depending on the H chain isotype.
  • Variability is not evenly distributed throughout the variable domains of antibodies; it is concentrated in sub-domains of each of the heavy and light chain variable regions. These sub-domains are called “hypervariable regions” or “complementarity determining regions” (CDRs).
  • CDRs complementarity determining regions
  • the more conserved (i.e., non-hypervariable) portions of the variable domains are called the "framework" regions (FRM or FR) and provide a scaffold for the six CDRs in three dimensional space to form an antigen-binding surface.
  • variable domains of naturally occurring heavy and light chains each comprise four FRM regions (FR1, FR2, FR3, and FR4), largely adopting a ⁇ -sheet configuration, connected by three hypervariable regions, which form loops connecting, and in some cases forming part of, the ⁇ -sheet structure.
  • the hypervariable regions in each chain are held together in close proximity by the FRM and, with the hypervariable regions from the other chain, contribute to the formation of the antigen-binding site (see Kabat et al., loc. cit .).
  • the constant domains are not directly involved in antigen binding, but exhibit various effector functions, such as, for example, antibody-dependent, cell-mediated cytotoxicity and complement activation.
  • CDR refers to the complementarity determining region of which three make up the binding character of a light chain variable region (CDR-L1, CDR-L2 and CDR-L3) and three make up the binding character of a heavy chain variable region (CDR-H1, CDR-H2 and CDR-H3).
  • CDRs contain most of the residues responsible for specific interactions of the antibody with the antigen and hence contribute to the functional activity of an antibody molecule: they are the main determinants of antigen specificity.
  • CDRs may therefore be referred to by Kabat, Chothia, contact or any other boundary definitions, including the numbering system described herein. Despite differing boundaries, each of these systems has some degree of overlap in what constitutes the so called "hypervariable regions" within the variable sequences. CDR definitions according to these systems may therefore differ in length and boundary areas with respect to the adjacent framework region. See for example Kabat (an approach based on cross-species sequence variability), Chothia (an approach based on crystallographic studies of antigen-antibody complexes), and/or MacCallum (Kabat et al., loc. cit .; Chothia et al., J. Mol.
  • CDRs form a loop structure that can be classified as a canonical structure.
  • canonical structure refers to the main chain conformation that is adopted by the antigen binding (CDR) loops. From comparative structural studies, it has been found that five of the six antigen binding loops have only a limited repertoire of available conformations. Each canonical structure can be characterized by the torsion angles of the polypeptide backbone. Correspondent loops between antibodies may, therefore, have very similar three dimensional structures, despite high amino acid sequence variability in most parts of the loops ( Chothia and Lesk, J. Mol.
  • canonical structure may also include considerations as to the linear sequence of the antibody, for example, as catalogued by Kabat (Kabat et al., loc. cit.).
  • Kabat numbering scheme system
  • a given antibody sequence may be placed into a canonical class which allows for, among other things, identifying appropriate chassis sequences (e.g ., based on a desire to include a variety of canonical structures in a library).
  • Kabat numbering of antibody amino acid sequences and structural considerations as described by Chothia et al., loc. cit. and their implications for construing canonical aspects of antibody structure are described in the literature.
  • the subunit structures and three-dimensional configurations of different classes of immunoglobulins are well known in the art. For a review of the antibody structure, see Antibodies: A Laboratory Manual, Cold Spring Harbor Laboratory, eds. Harlow et al., 1988 .
  • the CDR3 of the light chain and, particularly, the CDR3 of the heavy chain may constitute the most important determinants in antigen binding within the light and heavy chain variable regions.
  • the heavy chain CDR3 appears to constitute the major area of contact between the antigen and the antibody.
  • CDR3 is typically the greatest source of molecular diversity within the antibody-binding site.
  • H3 for example, can be as short as two amino acid residues or greater than 26 amino acids.
  • the sequence of antibody genes after assembly and somatic mutation is highly varied, and these varied genes are estimated to encode 10 10 different antibody molecules ( Immunoglobulin Genes, 2nd ed., eds. Jonio et al., Academic Press, San Diego, CA, 1995 ). Accordingly, the immune system provides a repertoire of immunoglobulins.
  • the term "repertoire” refers to at least one nucleotide sequence derived wholly or partially from at least one sequence encoding at least one immunoglobulin.
  • the sequence(s) may be generated by rearrangement in vivo of the V, D, and J segments of heavy chains, and the V and J segments of light chains.
  • sequence(s) can be generated from a cell in response to which rearrangement occurs, e.g., in vitro stimulation.
  • part or all of the sequence(s) may be obtained by DNA splicing, nucleotide synthesis, mutagenesis, and other methods, see, e.g., U.S. Patent 5,565,332 .
  • a repertoire may include only one sequence or may include a plurality of sequences, including ones in a genetically diverse collection.
  • the first binding domain of the bispecific single chain antibody construct of the invention comprises a VH region selected from the group consisting of VH regions as depicted in as depicted in SEQ ID NO: 155, SEQ ID NO: 165, SEQ ID NO: 175, SEQ ID NO: 185, SEQ ID NO: 195, SEQ ID NO: 205, SEQ ID NO: 215, SEQ ID NO: 225, SEQ ID NO: 235, and SEQ ID NO: 245.
  • the first binding domain comprises a VL region selected from the group consisting of VL regions as depicted in SEQ ID NO: 156, SEQ ID NO: 166, SEQ ID NO: 176, SEQ ID NO: 186, SEQ ID NO: 196, SEQ ID NO: 206, SEQ ID NO: 216, SEQ ID NO: 226, SEQ ID NO: 236, and SEQ ID NO: 246.
  • the first binding domain comprises a VH region and a VL region selected from the group consisting of pairs of a VH region and a VL region as depicted in SEQ ID NO: 155+156, SEQ ID NO: 165+166, SEQ ID NO: 175+176, SEQ ID NO: 185+186, SEQ ID NO: 195+196, SEQ ID NO: 205+206, SEQ ID NO: 215+216, SEQ ID NO: 225+226, SEQ ID NO: 235+236, and SEQ ID NO: 245+246.
  • the first binding domain of the bispcecific single chain antibody construct of the invention comprises a VH region selected from the group consisting of VH regions as depicted in SEQ ID NO: 285, SEQ ID NO: 295, SEQ ID NO: 305, SEQ ID NO: 315, SEQ ID NO: 325, SEQ ID NO: 335, SEQ ID NO: 345, and SEQ ID NO: 355.
  • the first binding domain comprises a VL region selected from the group consisting of VL regions as depicted in SEQ ID NO: 286, SEQ ID NO: 296, SEQ ID NO: 306, SEQ ID NO: 316, SEQ ID NO: 326, SEQ ID NO: 336, SEQ ID NO: 346, and SEQ ID NO: 356.
  • the first binding domain comprises a VH region and a VL region selected from the group consisting of pairs of a VH region and a VL region as depicted in SEQ ID NO: 285+286, SEQ ID NO: 295+296, SEQ ID NO: 305+306, SEQ ID NO: 315+316, SEQ ID NO: 325+326, SEQ ID NO: 335+336, SEQ ID NO: 345+346, and SEQ ID NO: 355+356.
  • bispecific refers to an antibody construct which is "at least bispecific", i.e ., it comprises at least a first binding domain and a second binding domain, wherein the first binding domain binds to one antigen or target (here: CDH3), and the second binding domain binds to another antigen or target (here: CD3). Accordingly, antibody constructs according to the invention comprise specificities for at least two different antigens or targets.
  • bispecific antibody construct of the invention also encompasses multispecific antibody constructs such as trispecific antibody constructs, the latter ones including three binding domains, or constructs having more than three (e.g. four, five...) specificites.
  • the bispcecific single chain antibody constructs according to the invention are (at least) bispecific, they do not occur naturally and they are markedly different from naturally occurring products.
  • a "bispecific" antibody construct or immunoglobulin is hence an artificial hybrid antibody or immunoglobulin having at least two distinct binding sites with different specificities.
  • Bispecific antibodies can be produced by a variety of methods including fusion of hybridomas or linking of Fab' fragments. See, e.g. , Songsivilai & Lachmann, Clin. Exp. Immunol. 79:315-321 (1990 ).
  • the at least two binding domains and the variable domains of the antibody construct of the present invention may or may not comprise peptide linkers (spacer peptides).
  • peptide linker defines in accordance with the present invention an amino acid sequence by which the amino acid sequences of one (variable and/or binding) domain and another (variable and/or binding) domain of the antibody construct of the invention are linked with each other.
  • An essential technical feature of such peptide linker is that it does not comprise any polymerization activity.
  • suitable peptide linkers are those described in U.S. Patents 4,751,180 and 4,935,233 or WO 88/09344 .
  • this linker is preferably of a length and sequence sufficient to ensure that each of the first and second domains can, independently from one another, retain their differential binding specificities.
  • those peptide linkers are preferred which comprise only a few number of amino acid residues, e.g. 12 amino acid residues or less.
  • peptide linker of 12, 11, 10, 9, 8, 7, 6 or 5 amino acid residues are preferred.
  • An envisaged peptide linker with less than 5 amino acids comprises 4, 3, 2 or one amino acid(s), wherein Gly-rich linkers are preferred.
  • a particularly preferred "single" amino acid in context of said "peptide linker” is Gly. Accordingly, said peptide linker may consist of the single amino acid Gly.
  • Another preferred embodiment of a peptide linker is characterized by the amino acid sequence Gly-Gly-Gly-Gly-Ser, i.e. Gly 4 Ser (SEQ ID NO: 393), or polymers thereof, i.e. (Gly 4 Ser)x, where x is an integer of 1 or greater.
  • the characteristics of said peptide linker, which comprise the absence of the promotion of secondary structures are known in the art and are described e.g . in Dall'Acqua et al. (Biochem.
  • the invention hence provides an antibody construct which is in a format of an scFv.
  • the term "is in a format” does not exclude that the construct can be further modified, e.g. by attachment or fusion to other moieties, as described herein.
  • the antibody construct of the invention is a "bispecific single chain antibody construct" in the format of a "single chain Fv" (scFv).
  • scFv single chain Fv
  • VL and VH the two domains of the Fv fragment, VL and VH, are coded for by separate genes, they can be joined, using recombinant methods, by a synthetic linker that enables them to be made as a single protein chain in which the VL and VH regions pair to form a monovalent molecule; see e.g ., Huston et al. (1988) Proc. Natl. Acad. Sci USA 85:5879-5883 ).
  • These antibody fragments are obtained using conventional techniques known to those with skill in the art, and the fragments are evaluated for function in the same manner as are whole or full-length antibodies.
  • a single-chain variable fragment is hence a fusion protein of the variable region of the heavy chain (VH) and of the light chain (VL) of immunoglobulins, usually connected with a short linker peptide of about ten to about 25 amino acids, preferably about 15 to 20 amino acids.
  • the linker is usually rich in glycine for flexibility, as well as serine or threonine for solubility, and can either connect the N-terminus of the VH with the C-terminus of the VL, or vice versa. This protein retains the specificity of the original immunoglobulin, despite removal of the constant regions and introduction of the linker.
  • Bispecific single chain molecules are known in the art and are described in WO 99/54440 , Mack, J. Immunol. (1997), 158, 3965-3970 , Mack, PNAS, (1995), 92, 7021-7025 , Kufer, Cancer Immunol. Immunother., (1997), 45, 193-197 , Löffler, Blood, (2000), 95, 6, 2098-2103 , Brühl, Immunol., (2001), 166, 2420-2426 , Kipriyanov, J. Mol. Biol., (1999), 293, 41-56 .
  • Techniques described for the production of single chain antibodies see, inter alia, US Patent 4,946,778 , Kontermann and Dübel (2010), loc. cit. and Little (2009), loc. cit. ) can be adapted to produce single chain antibody constructs specifically recognizing (an) elected target(s).
  • Bivalent (also called divalent) or bispecific single-chain variable fragments can be engineered by linking two scFv molecules. If these two scFv molecules have the same binding specificity, the resulting (scFv) 2 molecule will preferably be called bivalent ( i.e . it has two valences for the same target epitope). If the two scFv molecules have different binding specificities, the resulting (scFv) 2 molecule will preferably be called bispecific.
  • the linking can be done by producing a single peptide chain with two VH regions and two VL regions, yielding tandem scFvs (see e.g.
  • the heavy chain (VH) and the light chain (VL) of a binding domain are not directly connected via a peptide linker as described above, but the binding domains are formed as described for the diabody.
  • the VH of the CD3 binding domain may be fused to the VL of the CDH3 binding domain via a peptide linker, and the VH of the CDH3 binding domain is fused to the VL of the CD3 binding domain via such peptide linker.
  • single domain antibodies comprise merely one (monomeric) antibody variable domain which is able to bind selectively to a specific antigen, independently of other V regions or domains.
  • the first single domain antibodies were engineered from havy chain antibodies found in camelids, and these are called V H H fragments.
  • Cartilaginous fishes also have heavy chain antibodies (IgNAR) from which single domain antibodies called V NAR fragments can be obtained.
  • IgNAR heavy chain antibodies
  • An alternative approach is to split the dimeric variable domains from common immunoglobulins e.g . from humans or rodents into monomers, hence obtaining VH or VL as a single domain Ab.
  • nanobodies derived from light chains have also been shown to bind specifically to target epitopes. Examples of single domain antibodies are called sdAb, nanobodies or single variable domain antibodies.
  • a (single domain mAb) 2 is hence a monoclonal antibody construct composed of (at least) two single domain monoclonal antibodies, which are individually selected from the group comprising VH, VL, V H H and V NAR .
  • the linker is preferably in the form of a peptide linker.
  • an "scFv-single domain mAb" is a monoclonal antibody construct composed of at least one single domain antibody as described above and one scFv molecule as described above.
  • the linker is preferably in the form of a peptide linker.
  • the first human binding domain comprises an amino acid sequence selected from the group consisting of those sequences as depicted in SEQ ID NO: 157, SEQ ID NO: 167, SEQ ID NO: 177, SEQ ID NO: 187, SEQ ID NO: 197, SEQ ID NO: 207, SEQ ID NO: 217, SEQ ID NO: 227, SEQ ID NO: 237, and SEQ ID NO: 247.
  • the first human binding domain comprises an amino acid sequence selected from the group consisting of those sequences as depicted in SEQ ID NO: 287, SEQ ID NO: 297, SEQ ID NO: 307, SEQ ID NO: 317, SEQ ID NO: 327, SEQ ID NO: 337, SEQ ID NO: 347, and SEQ ID NO: 357.
  • the bispecific single chain antibody construct of the invention has, in addition to its function to bind to the target molecules CDH3 and CD3, a further function.
  • the antibody construct is a trifunctional or multifunctional antibody construct by targeting target cells through binding to CDH3, mediating cytotoxic T cell activity through CD3 binding and providing a further function such as a fully functional Fc constant domain mediating antibody-dependent cellular cytotoxicity through recruitment of effector cells like NK cells, a label (fluorescent etc.), a therapeutic agent such as a toxin or radionuclide, and/or means to enhance serum half-life, etc.
  • Examples for means to extend serum half-life of the bispecific single chain antibody constructs of the invention include peptides, proteins or domains of proteins, which are fused or otherwise attached to the antibody constructs.
  • the group of peptides, proteins or protein domains includes peptides binding to other proteins with preferred pharmacokinetic profile in the human body such as serum albumin (see WO 2009/127691 ).
  • serum albumin see WO 2009/127691 .
  • An alternative concept of such half-life extending (HLE) peptides includes peptides binding to the neonatal Fc receptor (FcRn, see WO 2007/098420 ), which are also used in some of the constructs of the present invention.
  • the concept of attaching larger domains of proteins or complete proteins includes e.g . the fusion of human serum albumin, variants or mutants of human serum albumin (see WO 2011/051489 , WO 2012/059486 , WO 2012/150319 , WO 2013/135896 , WO 2014/072481 , WO 2013/075066 ) or domains thereof as well as the fusion of constant region of immunoglobulins (Fc domains) and variants thereof.
  • Such variants of Fc domains may be optimized/modified in order to allow the desired pairing of dimers or mulimers, to abolish Fc receptor binding (e.g. the Fc ⁇ receptor) or for other reasons.
  • HLE molecules are composed of only one single polypeptide chain, they have the advantage that (i) there is no need for two separate expression systems, and (ii) they can be isolated having a high degree of purity, due to the absence of a "dummy chain".
  • a further concept known in the art to extend the half-life of small protein compounds in the human body is the pegylation of those compounds such as the antibody construct of the present invention.
  • the bispecific single chain antibody constructs according to the invention may be linked ( e.g . via peptide bond) with a fusion partner (such as a protein or polypeptide or peptide), e.g . for the purpose of extending the construct's serum half-life.
  • a fusion partner such as a protein or polypeptide or peptide
  • fusion partners can be selected from human serum albumin ("HSA” or "HALB") as wells as sequence variants thereof, peptides binding to HSA, peptides binding to FcRn (“FcRn BP”), or constructs comprising an (antibody derived) Fc region.
  • HSA human serum albumin
  • FcRn BP FcRn BP
  • constructs comprising an (antibody derived) Fc region Exemplary sequences of these fusion partners are depticed in SEQ ID NOs: 406-421 and 437-444.
  • the fusion partners may be linked to the N-terminus or to the C-terminus of the bispecific antibody constructs according to the invention, either directly ( e.g . via peptide bond) or through a peptide linker such as (GGGGS) n (wherein "n” is an integer of 2 or greater, e.g. 2 or 3 or 4).
  • Suitable peptide linkers are depticed in SEQ ID NOs: 392-400.
  • the bispecific single chain antibody construct denominated CDH3-13 (full-length sequence of the bispecific molecule as depicted in SEQ ID NO: 178) was linked in frame with a selection of fusion proteins or fusion peptides (see e.g. SEQ ID NOs: 437-444) for the purpose of extending the construct's serum half-life.
  • the respective sequences of these fusion constructs are depticed in SEQ ID NOs: 379-389.
  • the sequences of these fusion partners to the "naked" bispecific antibody construct may as well be linked (C- or N-terminally, in the way it corresponds and it is shown for CDH3-13) to any other of the antibody constructs disclosed herein.
  • the bispecific sigle chain antibody construct of the invention furthermore comprises a polypeptide as depticed in SEQ ID NO: 437 or an albumin, preferably a human albumin or a variant thereof (having improved properties such as affinities to FcRn receptor and extended plasma half-life), most preferably an albumin as depicted in SEQ ID NO: 443 or 444.
  • these moieties are preferably fused in frame to the C-terminus of the bispecific antibody construct.
  • Example 15 furthermore shows an unexpected advantage that the C-terminal fusion of an albumin to a bispecific antibody construct of the invention involves.
  • bispecific T cell engaging molecules comprising a binding domain specific for the human and Callithrix jacchus, Saguinus oedipus or Saimiri sciureus CD3 ⁇ chain, wherein the epitope is part of an amino acid sequence comprised in the group consisting of SEQ ID NOs: 2, 4, 6, or 8 of WO 2008/119567 of and comprises at least the amino acid sequence Gln-Asp-Gly-Asn-Glu, it was observed that those molecules - when used in very high concentrations - showed T cell cytotoxicity even in the absence of target cells.
  • Such high concentration issues may become relevant for specific administration routes or in combination with specific target settings and required compound concentrations.
  • Preferred examples of such second binding domains which bind to human CD3 on the surface of a T cell are described herein below and depticted in SEQ ID NOs: 445-537.
  • T cell cytotoxicity is avoided, see Figure 13 .
  • the activation of T cells in the presence of a high concentration of a T cell engaging bispecific antibody constructs and in the absence of target cells may be explained by dimerization or multimerization of the antibody constucts via the CD3 binding domain.
  • Such di- or multimerization is sterically impaired by the fusion of an albumin or variant thereof to the C terminus of the antibody construct, while maintaining the characteristics of the antibody construct for its T cell engaging mode of action.
  • a bispecific single chain antibody construct according to the present invention comprises in an N- to C-terminal order:
  • the bispecific single chain antibody construct of the invention comprises (in addition to the two binding domains) a third domain which comprises two polypeptide monomers, each comprising a hinge, a CH2 and a CH3 domain, wherein said two polypeptides (or polypeptide monomers) are fused to each other via a peptide linker.
  • said third domain comprises in an N- to C-terminal order: hinge-CH2-CH3-linker-hinge-CH2-CH3.
  • Preferred amino acid sequences for said third domain are depicted in SEQ ID NOs: 414-421.
  • Each of said polypeptide monomers preferably has an amino acid sequence that is selected from the group consisting of SEQ ID NOs: 406-413, or that is at least 90% identical to those sequences.
  • the first and second binding domains of the bispecific antibody construct of the invention are fused to the third domain via a peptide linker which is for example selected from the group consisting of any one of SEQ ID NOs: 392-400, preferably from the group consisting of any one of SEQ ID NOs: 392, 393, 395, 396, 397, 399, and 400.
  • a "hinge” is an IgG hinge region. This region can be identified by analogy using the Kabat numbering, see Kabat positions 223-243. In line with the above, the minimal requirement for a "hinge” are the amino acid residues corresponding to the IgG1 sequence stretch of D231 to P243 according to the Kabat numbering.
  • the terms CH2 and CH3 refer to the immunoglobulin heavy chain constant regions 2 and 3. These regions can as well be identified by analogy using the Kabat numbering, see Kabat positions 244-360 for CH2 and Kabat positions 361-478 for CH3.
  • Fc monomer refers to the last two heavy chain constant regions of IgA, IgD, and IgG, and the last three heavy chain constant regions of IgE and IgM.
  • the Fc monomer can also include the flexible hinge N-terminal to these domains.
  • the Fc monomer may include the J chain.
  • the Fc portion comprises immunoglobulin domains CH2 and CH3 and the hinge between the first two domains and CH2.
  • the boundaries of the Fc portion of an immunoglobulin may vary, an example for a human IgG heavy chain Fc portion comprising a functional hinge, CH2 and CH3 domain can be defined e.g. to comprise residues D231 (of the hinge domain) to P476 (of the C-terminus of the CH3 domain), or D231 to L476, respectively, for IgG4, wherein the numbering is according to Kabat.
  • the antibody construct of the invention may hence comprise in an N- to C-terminal order:
  • the antibody construct of the invention comprises in an N- to C-terminal order:
  • the antibody construct of the present invention comprises or consists of a polypeptide selected from the group consisting of those depicted in SEQ ID NO: 422, SEQ ID NO: 423, SEQ ID NO: 424, SEQ ID NO: 425, SEQ ID NO: 426, SEQ ID NO: 427, SEQ ID NO: 428, SEQ ID NO: 429, SEQ ID NO: 430, SEQ ID NO: 431, SEQ ID NO: 432, SEQ ID NO: 433, SEQ ID NO: 434, and SEQ ID NO: 435.
  • Example 15 showing one of the above described Fc constructs and its anti-tumor activity in a mouse xenograft model.
  • Covalent modifications of the antibody constructs are also included within the scope of this invention, and are generally, but not always, done post-translationally.
  • several types of covalent modifications of the antibody construct are introduced into the molecule by reacting specific amino acid residues of the antibody construct with an organic derivatizing agent that is capable of reacting with selected side chains or the N- or C-terminal residues.
  • Cysteinyl residues most commonly are reacted with ⁇ -haloacetates (and corresponding amines), such as chloroacetic acid or chloroacetamide, to give carboxymethyl or carboxyamidomethyl derivatives. Cysteinyl residues also are derivatized by reaction with bromotrifluoroacetone, ⁇ -bromo- ⁇ -(5-imidozoyl)propionic acid, chloroacetyl phosphate, N-alkylmaleimides, 3-nitro-2-pyridyl disulfide, methyl 2-pyridyl disulfide, p-chloromercuribenzoate, 2-chloromercuri-4-nitrophenol, or chloro-7-nitrobenzo-2-oxa-1,3-diazole.
  • Histidyl residues are derivatized by reaction with diethylpyrocarbonate at pH 5.5-7.0 because this agent is relatively specific for the histidyl side chain.
  • Para-bromophenacyl bromide also is useful; the reaction is preferably performed in 0.1 M sodium cacodylate at pH 6.0.
  • Lysinyl and amino terminal residues are reacted with succinic or other carboxylic acid anhydrides. Derivatization with these agents has the effect of reversing the charge of the lysinyl residues.
  • Suitable reagents for derivatizing alpha-amino-containing residues include imidoesters such as methyl picolinimidate; pyridoxal phosphate; pyridoxal; chloroborohydride; trinitrobenzenesulfonic acid; O-methylisourea; 2,4-pentanedione; and transaminase-catalyzed reaction with glyoxylate.
  • imidoesters such as methyl picolinimidate; pyridoxal phosphate; pyridoxal; chloroborohydride; trinitrobenzenesulfonic acid; O-methylisourea; 2,4-pentanedione; and transaminase-catalyzed reaction with glyoxylate.
  • Arginyl residues are modified by reaction with one or several conventional reagents, among them phenylglyoxal, 2,3-butanedione, 1,2-cyclohexanedione, and ninhydrin. Derivatization of arginine residues requires that the reaction be performed in alkaline conditions because of the high pKa of the guanidine functional group. Furthermore, these reagents may react with the groups of lysine as well as the arginine epsilon-amino group.
  • tyrosyl residues may be made, with particular interest in introducing spectral labels into tyrosyl residues by reaction with aromatic diazonium compounds or tetranitromethane.
  • aromatic diazonium compounds or tetranitromethane Most commonly, N-acetylimidizole and tetranitromethane are used to form O-acetyl tyrosyl species and 3-nitro derivatives, respectively.
  • Tyrosyl residues are iodinated using 125 I or 131 I to prepare labeled proteins for use in radioimmunoassay, the chloramine T method described above being suitable.
  • R and R' are optionally different alkyl groups, such as 1-cyclohexyl-3-(2-morpholinyl-4-ethyl) carbodiimide or 1-ethyl-3-(4-azonia-4,4-dimethylpentyl) carbodiimide.
  • aspartyl and glutamyl residues are converted to asparaginyl and glutaminyl residues by reaction with ammonium ions.
  • Derivatization with bifunctional agents is useful for crosslinking the antibody constructs of the present invention to a water-insoluble support matrix or surface for use in a variety of methods.
  • Commonly used crosslinking agents include, e.g. , 1,1-bis(diazoacetyl)-2-phenylethane, glutaraldehyde, N-hydroxysuccinimide esters, for example, esters with 4-azidosalicylic acid, homobifunctional imidoesters, including disuccinimidyl esters such as 3,3'-dithiobis(succinimidylpropionate), and bifunctional maleimides such as bis-N-maleimido-1,8-octane.
  • Derivatizing agents such as methyl-3-[(p-azidophenyl)dithio]propioimidate yield photoactivatable intermediates that are capable of forming crosslinks in the presence of light.
  • reactive water-insoluble matrices such as cyanogen bromide-activated carbohydrates and the reactive substrates as described in U.S. Pat. Nos. 3,969,287 ; 3,691,016 ; 4,195,128 ; 4,247,642 ; 4,229,537 ; and 4,330,440 are employed for protein immobilization.
  • Glutaminyl and asparaginyl residues are frequently deamidated to the corresponding glutamyl and aspartyl residues, respectively. Alternatively, these residues are deamidated under mildly acidic conditions. Either form of these residues falls within the scope of this invention.
  • glycosylation patterns can depend on both the sequence of the protein (e.g ., the presence or absence of particular glycosylation amino acid residues, discussed below), or the host cell or organism in which the protein is produced. Particular expression systems are discussed below.
  • N-linked refers to the attachment of the carbohydrate moiety to the side chain of an asparagine residue.
  • the tri-peptide sequences asparagine-X-serine and asparagine-X-threonine, where X is any amino acid except proline, are the recognition sequences for enzymatic attachment of the carbohydrate moiety to the asparagine side chain.
  • O-linked glycosylation refers to the attachment of one of the sugars N-acetylgalactosamine, galactose, or xylose, to a hydroxyamino acid, most commonly serine or threonine, although 5-hydroxyproline or 5-hydroxylysine may also be used.
  • Addition of glycosylation sites to the antibody construct is conveniently accomplished by altering the amino acid sequence such that it contains one or more of the above-described tri-peptide sequences (for N-linked glycosylation sites).
  • the alteration may also be made by the addition of, or substitution by, one or more serine or threonine residues to the starting sequence (for O-linked glycosylation sites).
  • the amino acid sequence of an antibody construct is preferably altered through changes at the DNA level, particularly by mutating the DNA encoding the polypeptide at preselected bases such that codons are generated that will translate into the desired amino acids.
  • Another means of increasing the number of carbohydrate moieties on the antibody construct is by chemical or enzymatic coupling of glycosides to the protein. These procedures are advantageous in that they do not require production of the protein in a host cell that has glycosylation capabilities for N- and O-linked glycosylation.
  • the sugar(s) may be attached to (a) arginine and histidine, (b) free carboxyl groups, (c) free sulfhydryl groups such as those of cysteine, (d) free hydroxyl groups such as those of serine, threonine, or hydroxyproline, (e) aromatic residues such as those of phenylalanine, tyrosine, or tryptophan, or (f) the amide group of glutamine.
  • Removal of carbohydrate moieties present on the starting antibody construct may be accomplished chemically or enzymatically.
  • Chemical deglycosylation requires exposure of the protein to the compound trifluoromethanesulfonic acid, or an equivalent compound. This treatment results in the cleavage of most or all sugars except the linking sugar (N-acetylglucosamine or N-acetylgalactosamine), while leaving the polypeptide intact.
  • Chemical deglycosylation is described by Hakimuddin et al., 1987, Arch. Biochem. Biophys. 259:52 and by Edge et al., 1981, Anal. Biochem. 118:131 .
  • Enzymatic cleavage of carbohydrate moieties on polypeptides can be achieved by the use of a variety of endo- and exo-glycosidases as described by Thotakura et al., 1987, Meth. Enzymol. 138:350 .
  • Glycosylation at potential glycosylation sites may be prevented by the use of the compound tunicamycin as described by Duskin et al., 1982, J. Biol. Chem. 257:3105 . Tunicamycin blocks the formation of protein-N-glycoside linkages.
  • another type of covalent modification of the antibody construct comprises linking the antibody construct to various non-proteinaceous polymers, including, but not limited to, various polyols such as polyethylene glycol, polypropylene glycol, polyoxyalkylenes, or copolymers of polyethylene glycol and polypropylene glycol, in the manner set forth in U.S. Patent Nos. 4,640,835 ; 4,496,689 ; 4,301,144 ; 4,670,417 ; 4,791,192 or 4,179,337 .
  • amino acid substitutions may be made in various positions within the antibody construct, e.g. in order to facilitate the addition of polymers such as PEG.
  • the covalent modification of the antibody constructs of the invention comprises the addition of one or more labels.
  • the labelling group may be coupled to the antibody construct via spacer arms of various lengths to reduce potential steric hindrance.
  • Various methods for labelling proteins are known in the art and can be used in performing the present invention.
  • label or “labelling group” refers to any detectable label. In general, labels fall into a variety of classes, depending on the assay in which they are to be detected - the following examples include, but are not limited to:
  • fluorescent label any molecule that may be detected via its inherent fluorescent properties. Suitable fluorescent labels include, but are not limited to, fluorescein, rhodamine, tetramethylrhodamine, eosin, erythrosin, coumarin, methyl-coumarins, pyrene, Malacite green, stilbene, Lucifer Yellow, Cascade BlueJ, Texas Red, IAEDANS, EDANS, BODIPY FL, LC Red 640, Cy 5, Cy 5.5, LC Red 705, Oregon green, the Alexa-Fluor dyes (Alexa Fluor 350, Alexa Fluor 430, Alexa Fluor 488, Alexa Fluor 546, Alexa Fluor 568, Alexa Fluor 594, Alexa Fluor 633, Alexa Fluor 660, Alexa Fluor 680), Cascade Blue, Cascade Yellow and R-phycoerythrin (PE) (Molecular Probes, Eugene, OR), FITC, Rhodamine, and
  • Suitable proteinaceous fluorescent labels also include, but are not limited to, green fluorescent protein, including a Renilla, Ptilosarcus, or Aequorea species of GFP ( Chalfie et al., 1994, Science 263:802-805 ), EGFP (Clontech Laboratories, Inc., Genbank Accession Number U55762 ), blue fluorescent protein (BFP, Quantum Biotechnologies, Inc. 1801 de Maisonneuve Blvd. West, 8th Floor, Montreal, Quebec, Canada H3H 1J9; Stauber, 1998, Biotechniques 24:462-471 ; Heim et al., 1996, Curr. Biol.
  • green fluorescent protein including a Renilla, Ptilosarcus, or Aequorea species of GFP ( Chalfie et al., 1994, Science 263:802-805 ), EGFP (Clontech Laboratories, Inc., Genbank Accession Number U55762 ), blue fluorescent protein (BFP, Quantum Biotechnologies, Inc. 1801 de
  • EYFP enhanced yellow fluorescent protein
  • luciferase Ichiki et al., 1993, J. Immunol. 150:5408-5417
  • ⁇ galactosidase Nolan et al., 1988, Proc. Natl. Acad. Sci. U.S.A. 85:2603-2607
  • Renilla WO92/15673 , WO95/07463 , WO98/14605 , WO98/26277 , WO99/49019
  • Leucine zipper domains are peptides that promote oligomerization of the proteins in which they are found. Leucine zippers were originally identified in several DNA-binding proteins ( Landschulz et al., 1988, Science 240:1759 ), and have since been found in a variety of different proteins. Among the known leucine zippers are naturally occurring peptides and derivatives thereof that dimerize or trimerize. Examples of leucine zipper domains suitable for producing soluble oligomeric proteins are described in PCT application WO 94/10308 , and the leucine zipper derived from lung surfactant protein D (SPD) described in Hoppe et al., 1994, FEBS Letters 344:191 .
  • SPD lung surfactant protein D
  • a modified leucine zipper that allows for stable trimerization of a heterologous protein fused thereto is described in Fanslow et al., 1994, Semin. Immunol. 6:267-78 .
  • recombinant fusion proteins comprising CDH3 antibody fragment or derivative fused to a leucine zipper peptide are expressed in suitable host cells, and the soluble oligomeric CDH3 antibody fragments or derivatives that form are recovered from the culture supernatant.
  • the bispecific single chain antibody construct of the invention may also comprise additional domains, which are e.g . helpful in the isolation of the molecule or relate to an adapted pharmacokinetic profile of the molecule.
  • Domains helpful for the isolation of an antibody construct may be selected from peptide motives or secondarily introduced moieties, which can be captured in an isolation method, e.g. an isolation column.
  • additional domains comprise peptide motives known as Myc-tag, HAT-tag, HA-tag, TAP-tag, GST-tag, chitin binding domain (CBD-tag), maltose binding protein (MBP-tag), Flag-tag, Strep-tag and variants thereof (e.g. Strepll-tag) and His-tag.
  • All herein disclosed antibody constructs characterized by the identified CDRs are preferred to comprise a His-tag domain, which is generally known as a repeat of consecutive His residues in the amino acid sequence of a molecule, preferably of five, and more preferably of six His residues (hexa-histidine, see SEQ ID NO: 436).
  • the His-tag may be located e.g . at the N- or C-terminus of the antibody construct, preferably it is located at the C-terminus.
  • a hexa-histidine tag (HHHHHH) is linked via peptide bond to the C-terminus of the antibody construct according to the invention.
  • the first human binding domain of the bispecific single chain antibody construct of the present invention binds to human and macaque CDH3 on the surface of a target cell.
  • the amino acid sequence of human CDH3 is represented by SEQ ID NO: 1. It is understood that the term "on the surface”, in the context of the present invention, means that the binding domain specifically binds to an epitope or epitope cluster comprised within the CDH3 extracellular domain (CDH3 ECD), wherein the binding domains have the following format: pairs of VH regions and VL regions in the format of an scFv.
  • the first binding domain according to the invention hence binds to CDH3 when it is expressed by naturally expressing cells or cell lines, and/or by cells or cell lines transformed or (stably / transiently) transfected with CDH3.
  • the first binding domain also binds to CDH3 when CDH3 is used as a "target” or "ligand” molecule in an in vitro binding assay such as BIAcore or Scatchard.
  • the "target cell” can be any prokaryotic or eukaryotic cell expressing CDH3 on its surface; preferably the target cell is a cell that is part of the human or animal body, such as a tumor or cancer cell.
  • CDH3 ECD refers to a form of CDH3 which is essentially free of transmembrane and cytoplasmic domains of CDH3. It will be understood by the skilled artisan that the transmembrane domain identified for the CDH3 polypeptide of the present invention is identified pursuant to criteria routinely employed in the art for identifying that type of hydrophobic domain. The exact boundaries of a transmembrane domain may vary but most likely by no more than about 5 amino acids at either end of the domain specifically mentioned herein. A preferred human CDH3 ECD is shown in SEQ ID NO: 3.
  • the affinity of the first binding domain for human CDH3 is preferably ⁇ 15 nM, more preferably ⁇ 10 nM, even more preferably ⁇ 5 nM, even more preferably ⁇ 1 nM, even more preferably ⁇ 05 nM, even more preferably ⁇ 0.1 nM, and most preferably ⁇ 0.05 nM.
  • the affinity can be measured for example in a BIAcore assay or in a Scatchard assay, e.g . as described in the Examples. Other methods of determining the affinity are well-known to the skilled person.
  • T cells or T lymphocytes are a type of lymphocyte (itself a type of white blood cell) that play a central role in cell-mediated immunity. There are several subsets of T cells, each with a distinct function. T cells can be distinguished from other lymphocytes, such as B cells and NK cells, by the presence of a T cell receptor (TCR) on the cell surface.
  • TCR T cell receptor
  • the TCR is responsible for recognizing antigens bound to major histocompatibility complex (MHC) molecules and is composed of two different protein chains. In 95% of the T cells, the TCR consists of an alpha ( ⁇ ) and beta ( ⁇ ) chain.
  • the T lymphocyte When the TCR engages with antigenic peptide and MHC (peptide/ MHC complex), the T lymphocyte is activated through a series of biochemical events mediated by associated enzymes, co-receptors, specialized adaptor molecules, and activated or released transcription factors
  • the CD3 receptor complex is a protein complex and is composed of four chains. In mammals, the complex contains a CD3 ⁇ (gamma) chain, a CD3 ⁇ (delta) chain, and two CD3 ⁇ (epsilon) chains. These chains associate with the T cell receptor (TCR) and the so-called ⁇ (zeta) chain to form the T cell receptor CD3 complex and to generate an activation signal in T lymphocytes.
  • TCR T cell receptor
  • ⁇ (zeta) chain to form the T cell receptor CD3 complex and to generate an activation signal in T lymphocytes.
  • the CD3 ⁇ (gamma), CD3 ⁇ (delta), and CD3 ⁇ (epsilon) chains are highly related cell-surface proteins of the immunoglobulin superfamily containing a single extracellular immunoglobulin domain.
  • the intracellular tails of the CD3 molecules contain a single conserved motif known as an immunoreceptor tyrosine-based activation motif or ITAM for short, which is essential for the signaling capacity of the TCR.
  • ITAM immunoreceptor tyrosine-based activation motif
  • the CD3 epsilon molecule is a polypeptide which in humans is encoded by the CD3E gene which resides on chromosome 11.
  • the most preferred CD3 binding epitope corresponds to amino acid residues 1-27 of the human CD3 epsilon extracellular domain.
  • the redirected lysis of target cells via the recruitment of T cells by the bispecific single chain antibody construct involves cytolytic synapse formation and delivery of perforin and granzymes.
  • the engaged T cells are capable of serial target cell lysis, and are not affected by immune escape mechanisms interfering with peptide antigen processing and presentation, or clonal T cell differentiation; see, for example, WO 2007/042261 .
  • Cytotoxicity mediated by CDH3/CD3 bispecific single chain antibody constructs can be measured in various ways.
  • Effector cells can be e.g. stimulated enriched (human) CD8 positive T cells or unstimulated (human) peripheral blood mononuclear cells (PBMC). If the target cells are of macaque origin or express or are transfected with macaque CDH3, the effector cells should also be of macaque origin such as a macaque T cell line, e.g. 4119LnPx. The target cells should express (at least the extracellular domain of) CDH3, e.g. human or macaque CDH3.
  • Target cells can be a cell line (such as CHO) which is stably or transiently transfected with CDH3, e.g.
  • the target cells can be a CDH3 positive natural expresser cell line.
  • EC50 values are expected to be lower with target cell lines expressing higher levels of CDH3 on the cell surface.
  • the effector to target cell (E:T) ratio is usually about 10:1, but can also vary.
  • Cytotoxic activity of CDH3/CD3 bispecific antibody constructs can be measured in a 51-chromium release assay (incubation time of about 18 hours) or in a in a FACS-based cytotoxicity assay (incubation time of about 48 hours). Modifications of the assay incubation time (cytotoxic reaction) are also possible.
  • MTT or MTS assays include bioluminescent assays, the sulforhodamine B (SRB) assay, WST assay, clonogenic assay and the ECIS technology.
  • SRB sulforhodamine B
  • the cytotoxic activity mediated by CDH3/CD3 bispecific single chain antibody constructs of the present invention is preferably measured in a cell-based cytotoxicity assay. It may also be measured in a 51-chromium release assay. It is represented by the EC 50 value, which corresponds to the half maximal effective concentration (concentration of the antibody construct which induces a cytotoxic response halfway between the baseline and maximum).
  • the EC 50 value of the CDH3xCD3 bispecific antibody constructs is ⁇ 5000 pg/ml or ⁇ 4000 pg/ml, more preferably ⁇ 3000 pg/ml or ⁇ 2000 pg/ml, even more preferably ⁇ 1000 pg/ml or ⁇ 500 pg/ml, even more preferably ⁇ 400 pg/ml or ⁇ 300 pg/ml, even more preferably ⁇ 200 pg/ml, even more preferably ⁇ 100 pg/ml, even more preferably ⁇ 50 pg/ml, even more preferably ⁇ 20 pg/ml or ⁇ 10 pg/ml, and most preferably ⁇ 5 pg/ml.
  • EC 50 values can be measured in different assays.
  • the skilled person is aware that an EC50 value can be expected to be lower when stimulated / enriched CD8+ T cells are used as effector cells, compared with unstimulated PBMC. It can furthermore be expected that the EC50 values are lower when the target cells express a high number of the target antigen compared with a low target expression rat.
  • the EC 50 value of the CDH3xCD3 bispecific antibody construct is preferably ⁇ 1000 pg/ml, more preferably ⁇ 500 pg/ml, even more preferably ⁇ 250 pg/ml, even more preferably ⁇ 100 pg/ml, even more preferably ⁇ 50 pg/ml, even more preferably ⁇ 10 pg/ml, and most preferably ⁇ 5 pg/ml.
  • the EC 50 value of the CDH3xCD3 bispecific antibody construct is preferably ⁇ 5000 pg/ml or ⁇ 4000 pg/ml (in particular when the target cells are a CDH3 positive natural expresser cell line such as A431), more preferably ⁇ 2000 pg/ml (in particular when the target cells are CDH3 transfected cells such as CHO cells), more preferably ⁇ 1000 pg/ml or ⁇ 500 pg/ml, even more preferably ⁇ 200 pg/ml, even more preferably ⁇ 150 pg/ml, even more preferably ⁇ 100 pg/ml, and most preferably ⁇ 50 pg/ml, or lower.
  • the EC 50 value of the CDH3xCD3 bispecific antibody construct is preferably ⁇ 2000 pg/ml or ⁇ 1500 pg/ml, more preferably ⁇ 1000 pg/ml or ⁇ 500 pg/ml, even more preferably ⁇ 300 pg/ml or ⁇ 250 pg/ml, even more preferably ⁇ 100 pg/ml, and most preferably ⁇ 50 pg/ml.
  • the CDH3/CD3 bispecific single chain antibody constructs of the present invention do not induce / mediate lysis or do not essentially induce / mediate lysis of CDH3 negative cells such as CHO cells.
  • the term "do not induce lysis”, “do not essentially induce lysis”, “do not mediate lysis” or “do not essentially mediate lysis” means that an antibody construct of the present invention does not induce or mediate lysis of more than 30%, preferably not more than 20%, more preferably not more than 10%, particularly preferably not more than 9%, 8%, 7%, 6% or 5% of CDH3 negative cells, whereby lysis of a CDH3 positive cell line such as A431 is set to be 100%. This usually applies for concentrations of the antibody construct of up to 500 nM. The skilled person knows how to measure cell lysis without further ado. Moreover, the present specification teaches specific instructions how to measure cell lysis.
  • Potency gap The difference in cytotoxic activity between the monomeric and the dimeric isoform of individual CDH3/CD3 bispecific single chain antibody constructs is referred to as "potency gap".
  • This potency gap can e.g. be calculated as ratio between EC 50 values of the molecule's monomeric and dimeric form.
  • Potency gaps of the CDH3/CD3 bispecific antibody constructs of the present invention are preferably ⁇ 5, more preferably ⁇ 4, even more preferably ⁇ 3, even more preferably ⁇ 2 and most preferably ⁇ 1.
  • the potency gap for CDH3-13 was determined to be 0.5
  • the potency gap for CDH3-13xCD3-HLE (Fc) was determined to be 0.9
  • the potency gap for CDH3-25 was determined to be 0.7
  • the potency gap for CDH3-25xCD3-HALB was as well determined to be 0.7.
  • the first and/or the second (or any further) binding domain(s) of the antibody construct of the invention is/are preferably cross-species specific for members of the mammalian order of primates.
  • Cross-species specific CD3 binding domains are, for example, described in WO 2008/119567 .
  • the first and/or second binding domain in addition to binding to human CDH3 and human CD3, respectively, will also bind to CDH3/ CD3 of primates including (but not limited to) new world primates (such as Callithrix jacchus, Saguinus Oedipus or Saimiri sciureus), old world primates (such baboons and macaques), gibbons, and non-human homininae.
  • the first human binding domain binds to human CDH3 and further binds to macaque CDH3, such as CDH3 of Macaca fascicularis (SEQ ID NO: 5), and more preferably, to macaque CDH3 ECD.
  • the affinity of the first binding domain for macaque CDH3 is preferably ⁇ 15 nM, more preferably ⁇ 10 nM, even more preferably ⁇ 5 nM, even more preferably ⁇ 1 nM, even more preferably ⁇ 0.5 nM, even more preferably ⁇ 0.1 nM, and most preferably ⁇ 0.05 nM or even ⁇ 0.01 nM.
  • the affinity gap of the bispecific single chain antibody constructs according to the invention for binding macaque CDH3 versus human CDH3 [ma CDH3:hu CDH3] is between 0.1 and 10, more preferably between 0.2 and 5, even more preferably between 0.3 and 2.5, even more preferably between 0.4 and 2, and most preferably between 0.5 and 1.
  • the second binding domain binds to human and Callithrix jacchus, Saguinus Oedipus or Saimiri sciureus CD3 epsilon.
  • the second binding domain binds to an extracellular epitope of these CD3 epsilon chains. It is also envisaged that the second binding domain binds to an extracellular epitope of the human and the Macaca CD3 epsilon chain.
  • the most preferred epitope of CD3 epsilon is comprised within amino acid residues 1-27 of the human CD3 epsilon extracellular domain.
  • the epitope comprises at least the amino acid sequence Gln-Asp-Gly-Asn-Glu.
  • Callithrix jacchus and Saguinus oedipus are both new world primate belonging to the family of Callitrichidae, while Saimiri sciureus is a new world primate belonging to the family of Cebidae.
  • the second binding domain which binds to human CD3 on the surface of a T cell comprises a VL region comprising CDR-L1, CDR-L2 and CDR-L3 selected from:
  • the second binding domain which binds to human CD3 on the surface of a T cell comprises a VH region comprising CDR-H 1, CDR-H2 and CDR-H3 selected from:
  • the second binding domain which binds to human CD3 on the surface of a T cell comprises a VL region selected from the group consisting of a VL region as depicted in SEQ ID NO: 35, 39, 125, 129, 161 or 165 of WO 2008/119567 .
  • the second binding domain which binds to human CD3 on the surface of a T cell comprises a VH region selected from the group consisting of a VH region as depicted in SEQ ID NO: 15, 19, 33, 37, 51, 55, 69, 73, 87, 91, 105, 109, 123, 127, 141, 145, 159, 163, 177 or 181 of WO 2008/119567 .
  • the bispecific single chain antibody construct of the present invention is characterized by the second binding domain which binds to human CD3 on the surface of a T cell comprising a VL region and a VH region selected from the group consisting of:
  • the binding domains and in particular the second binding domain (which binds to human CD3 on the surface of a T cell) have the following format:
  • the pairs of VH regions and VL regions are in the format of a single chain antibody (scFv).
  • the VH and VL regions are arranged in the order VH-VL or VL-VH. It is preferred that the VH-region is positioned N-terminally to a linker sequence, and the VL-region is positioned C-terminally of the linker sequence.
  • a preferred embodiment of the above described bispecific single chain antibody construct of the present invention is characterized by the second binding domain which binds to human CD3 on the surface of a T cell comprising an amino acid sequence selected from the group consisting of SEQ ID NOs: 23, 25, 41, 43, 59, 61, 77, 79, 95, 97, 113, 115, 131, 133, 149, 151, 167, 169, 185 or 187 of WO 2008/119567 .
  • the bispecific single chain antibody construct has an amino acid sequence selected from the group consisting of those sequences as depicted in SEQ ID NO: 158, SEQ ID NO: 168, SEQ ID NO: 178, SEQ ID NO: 188, SEQ ID NO: 198, SEQ ID NO: 208, SEQ ID NO: 218, SEQ ID NO: 228, SEQ ID NO: 238, and SEQ ID NO: 248.
  • the bispecific single chain antibody construct has an amino acid sequence selected from the group consisting of those sequences as depicted in SEQ ID NO: 379, SEQ ID NO: 380, SEQ ID NO: 381, SEQ ID NO: 382, SEQ ID NO: 383, SEQ ID NO: 384, SEQ ID NO: 385, SEQ ID NO: 386, SEQ ID NO: 387, SEQ ID NO: 388 and SEQ ID NO: 389.
  • the bispecific single chain antibody construct has an amino acid sequence selected from the group consisting of those sequences as depicted in SEQ ID NO: 288, SEQ ID NO: 298, SEQ ID NO: 308, SEQ ID NO: 318, SEQ ID NO: 328, SEQ ID NO: 338, SEQ ID NO: 348, and SEQ ID NO: 358.
  • Amino acid sequence modifications of the bispecific single chain antibody constructs described herein are also contemplated. For example, it may be desirable to improve the binding affinity and/or other biological properties of the antibody construct.
  • Amino acid sequence variants of the antibody constructs are prepared by introducing appropriate nucleotide changes into the antibody constructs nucleic acid, or by peptide synthesis. All of the below described amino acd sequence modifications should result in a bispecific single chain antibody construct which still retains the desired biological activity (binding to CDH3 and to CD3) of the unmodified parental molecule.
  • amino acid typically refers to an amino acid having its art recognized definition such as an amino acid selected from the group consisting of: alanine (Ala or A); arginine (Arg or R); asparagine (Asn or N); aspartic acid (Asp or D); cysteine (Cys or C); glutamine (Gln or Q); glutamic acid (Glu or E); glycine (Gly or G); histidine (His or H); isoleucine (He or I): leucine (Leu or L); lysine (Lys or K); methionine (Met or M); phenylalanine (Phe or F); pro line (Pro or P); serine (Ser or S); threonine (Thr or T); tryptophan (Trp or W); tyrosine (Tyr or Y); and valine (Val or V), although modified, synthetic, or rare amino acids may be used as desired.
  • alanine Al or A
  • arginine
  • amino acids can be grouped as having a nonpolar side chain (e.g., Ala, Cys, He, Leu, Met, Phe, Pro, Val); a negatively charged side chain (e.g., Asp, Glu); a positively charged sidechain (e.g., Arg, His, Lys); or an uncharged polar side chain (e.g., Asn, Cys, Gln, Gly, His, Met, Phe, Ser, Thr, Trp, and Tyr).
  • a nonpolar side chain e.g., Ala, Cys, He, Leu, Met, Phe, Pro, Val
  • a negatively charged side chain e.g., Asp, Glu
  • a positively charged sidechain e.g., Arg, His, Lys
  • an uncharged polar side chain e.g., Asn, Cys, Gln, Gly, His, Met, Phe, Ser, Thr, Trp, and Tyr.
  • Amino acid modifications include, for example, deletions from, and/or insertions into, and/or substitutions of, residues within the amino acid sequences of the antibody constructs. Any combination of deletion, insertion, and substitution is made to arrive at the final construct, provided that the final construct possesses the desired characteristics.
  • the amino acid changes also may alter post-translational processes of the antibody constructs, such as changing the number or position of glycosylation sites.
  • amino acids may be inserted or deleted in each of the CDRs (of course, dependent on their length), while 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, or 25 amino acids may be inserted or deleted in each of the FRs.
  • amino acid sequence insertions include amino- and/or carboxyl-terminal fusions ranging in length from 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 residues to polypeptides containing a hundred or more residues, as well as intra-sequence insertions of single or multiple amino acid residues.
  • An insertional variant of the antibody construct of the invention includes the fusion to the N-terminus or to the C-terminus of the antibody construct of an enzyme or the fusion to a polypeptide which increases the serum half-life of the antibody construct.
  • the sites of greatest interest for substitutional mutagenesis include the CDRs of the heavy and/or light chain, in particular the hypervariable regions, but FR alterations in the heavy and/or light chain are also contemplated.
  • the substitutions are preferably conservative substitutions as described herein.
  • 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acids may be substituted in a CDR, while 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, or 25 amino acids may be substituted in the framework regions (FRs), depending on the length of the CDR or FR.
  • FRs framework regions
  • a useful method for identification of certain residues or regions of the antibody constructs that are preferred locations for mutagenesis is called "alanine scanning mutagenesis" as described by Cunningham and Wells in Science, 244: 1081-1085 (1989 ).
  • a residue or group of target residues within the antibody construct is/are identified (e.g. charged residues such as arg, asp, his, lys, and glu) and replaced by a neutral or negatively charged amino acid (most preferably alanine or polyalanine) to affect the interaction of the amino acids with the epitope.
  • Those amino acid locations demonstrating functional sensitivity to the substitutions then are refined by introducing further or other variants at, or for, the sites of substitution.
  • the site or region for introducing an amino acid sequence variation is predetermined, the nature of the mutation per se needs not to be predetermined.
  • alanine scanning or random mutagenesis may be conducted at a target codon or region, and the expressed antibody construct variants are screened for the optimal combination of desired activity.
  • Techniques for making substitution mutations at predetermined sites in the DNA having a known sequence are well known, for example, M13 primer mutagenesis and PCR mutagenesis. Screening of the mutants is done using assays of antigen binding activities, such as CDH3 or CD3 binding.
  • the then-obtained "substituted" sequence is at least 60%, more preferably 65%, even more preferably 70%, particularly preferably 75%, more particularly preferably 80% identical to the "original" CDR sequence. This means that it is dependent of the length of the CDR to which degree it is identical to the "substituted" sequence.
  • a CDR having 5 amino acids is preferably 80% identical to its substituted sequence in order to have at least one amino acid substituted.
  • the CDRs of the antibody construct may have different degrees of identity to their substituted sequences, e.g., CDRL1 may have 80%, while CDRL3 may have 90%.
  • substitutions are conservative substitutions.
  • any substitution including non-conservative substitution or one or more from the "exemplary substitutions” listed in Table 1, below is envisaged as long as the antibody construct retains its capability to bind to via the first binding domain and to CD3 or CD3 epsilon via the second binding domain and/or its CDRs have an identity to the then substituted sequence (at least 60%, more preferably 65%, even more preferably 70%, particularly preferably 75%, more particularly preferably 80% identical to the "original" CDR sequence).
  • Substantial modifications in the biological properties of the antibody construct of the present invention are accomplished by selecting substitutions that differ significantly in their effect on maintaining (a) the structure of the polypeptide backbone in the area of the substitution, for example, as a sheet or helical conformation, (b) the charge or hydrophobicity of the molecule at the target site, or (c) the bulk of the side chain.
  • Naturally occurring residues are divided into groups based on common side-chain properties: (1) hydrophobic: norleucine, met, ala, val, leu, ile; (2) neutral hydrophilic: cys, ser, thr; (3) acidic: asp, glu; (4) basic: asn, gin, his, lys, arg; (5) residues that influence chain orientation: gly, pro; and (6) aromatic : trp, tyr, phe.
  • Non-conservative substitutions will entail exchanging a member of one of these classes for another class. Any cysteine residue not involved in maintaining the proper conformation of the antibody construct may be substituted, generally with serine, to improve the oxidative stability of the molecule and prevent aberrant crosslinking. Conversely, cysteine bond(s) may be added to the antibody to improve its stability (particularly where the antibody is an antibody fragment such as an Fv fragment).
  • sequence identity and/or similarity is determined by using standard techniques known in the art, including, but not limited to, the local sequence identity algorithm of Smith and Waterman, 1981, Adv. Appl. Math. 2:482 , the sequence identity alignment algorithm of Needleman and Wunsch, 1970, J. Mol. Biol. 48:443 , the search for similarity method of Pearson and Lipman, 1988, Proc. Nat. Acad. Sci. U.S.A. 85:2444 , computerized implementations of these algorithms (GAP, BESTFIT, FASTA, and TFASTA in the Wisconsin Genetics Software Package, Genetics Computer Group, 575 Science Drive, Madison, Wis.), the Best Fit sequence program described by Devereux et al., 1984, Nucl.
  • Acid Res. 12:387-395 preferably using the default settings, or by inspection.
  • percent identity is calculated by FastDB based upon the following parameters: mismatch penalty of 1; gap penalty of 1; gap size penalty of 0.33; and joining penalty of 30, " Current Methods in Sequence Comparison and Analysis,” Macromolecule Sequencing and Synthesis, Selected Methods and Applications, pp 127-149 (1988), Alan R. Liss, Inc .
  • PILEUP creates a multiple sequence alignment from a group of related sequences using progressive, pairwise alignments. It can also plot a tree showing the clustering relationships used to create the alignment. PILEUP uses a simplification of the progressive alignment method of Feng & Doolittle, 1987, J. Mol. Evol. 35:351-360 ; the method is similar to that described by Higgins and Sharp, 1989, CABIOS 5:151-153 .
  • Useful PILEUP parameters including a default gap weight of 3.00, a default gap length weight of 0.10, and weighted end gaps.
  • BLAST algorithm Another example of a useful algorithm is the BLAST algorithm, described in: Altschul et al., 1990, J. Mol. Biol. 215:403-410 ; Altschul et al., 1997, Nucleic Acids Res. 25:3389-3402 ; and Karin et al., 1993, Proc. Natl. Acad. Sci. U.S.A. 90:5873-5787 .
  • a particularly useful BLAST program is the WU-BLAST-2 program which was obtained from Altschul et al., 1996, Methods in Enzymology 266:460-480 . WU-BLAST-2 uses several search parameters, most of which are set to the default values.
  • the HSP S and HSP S2 parameters are dynamic values and are established by the program itself depending upon the composition of the particular sequence and composition of the particular database against which the sequence of interest is being searched; however, the values may be adjusted to increase sensitivity.
  • Gapped BLAST uses BLOSUM-62 substitution scores; threshold T parameter set to 9; the two-hit method to trigger ungapped extensions, charges gap lengths of k a cost of 10+k; Xu set to 16, and Xg set to 40 for database search stage and to 67 for the output stage of the algorithms. Gapped alignments are triggered by a score corresponding to about 22 bits.
  • the amino acid homology, similarity, or identity between individual variant CDRs are at least 60% to the sequences depicted herein, and more typically with preferably increasing homologies or identities of at least 65% or 70%, more preferably at least 75% or 80%, even more preferably at least 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, and almost 100%.
  • percent (%) nucleic acid sequence identity with respect to the nucleic acid sequence of the binding proteins identified herein is defined as the percentage of nucleotide residues in a candidate sequence that are identical with the nucleotide residues in the coding sequence of the antibody construct.
  • a specific method utilizes the BLASTN module of WU-BLAST-2 set to the default parameters, with overlap span and overlap fraction set to 1 and 0.125, respectively.
  • nucleic acid sequence homology, similarity, or identity between the nucleotide sequences encoding individual variant CDRs and the nucleotide sequences depicted herein are at least 60%, and more typically with preferably increasing homologies or identities of at least 65%, 70%, 75%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99%, and almost 100%.
  • a "variant CDR" is one with the specified homology, similarity, or identity to the parent CDR of the invention, and shares biological function, including, but not limited to, at least 60%, 65%, 70%, 75%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% of the specificity and/or activity of the parent CDR.
  • the bispecific single chain antibody constructs of the present invention exhibit high monomer yields under standard research scale conditions, e.g., in a standard two-step purification process.
  • the monomer yield of the antibody constructs according to the invention is ⁇ 0.25 mg/L supernatant, more preferably ⁇ 0.5 mg/L, even more preferably ⁇ 1 mg/L, and most preferably ⁇ 3 mg/L supernatant.
  • the yield of the dimeric bispecific single chain antibody construct isoforms and hence the monomer percentage (i.e., monomer: (monomer+dimer)) of the antibody constructs can be determined.
  • the productivity of monomeric and dimeric antibody constructs and the calculated monomer percentage can e.g. be obtained in the SEC purification step of culture supernatant from standardized research-scale production in roller bottles.
  • the monomer percentage of the antibody constructs is ⁇ 80%, more preferably ⁇ 85%, even more preferably ⁇ 90%, and most preferably ⁇ 95%.
  • the percentage of identity to human germline of the antibody constructs according to the invention is ⁇ 70% or ⁇ 75%, more preferably ⁇ 80% or ⁇ 85%, even more preferably ⁇ 90%, and most preferably ⁇ 95%.
  • Identity to human antibody germline gene products is thought to be an important feature to reduce the risk of therapeutic proteins to elicit an immune response against the drug in the patient during treatment.
  • Hwang & Foote (“Immunogenicity of engineered antibodies"; Methods 36 (2005) 3-10 ) demonstrate that the reduction of non-human portions of drug antibody constructs leads to a decrease of risk to induce anti-drug antibodies in the patients during treatment.
  • the V-regions of VL can be aligned with the amino acid sequences of human germline V segments and J segments (http://vbase.mrc-cpe.cam.ac.uk/) using Vector NTI software and the amino acid sequence calculated by dividing the identical amino acid residues by the total number of amino acid residues of the VL in percent.
  • the same can be for the VH segments (http://vbase.mrc-cpe.cam.ac.uk/) with the exception that the VH CDR3 may be excluded due to its high diversity and a lack of existing human germline VH CDR3 alignment partners.
  • Recombinant techniques can then be used to increase sequence identity to human antibody germline genes.
  • the bispecific single chain antibody constructs have a preferred plasma stability (ratio of EC50 with plasma to EC50 w/o plasma) of ⁇ 5, more preferably ⁇ 4 or ⁇ 3.5, even more preferably ⁇ 3 or ⁇ 2.5, and most preferably ⁇ 2 or ⁇ 1.5 or ⁇ 1.
  • the plasma stability of an antibody construct can be tested by incubation of the construct in human plasma at 37°C for 24 hours followed by EC50 determination in a 51-chromium release cytotoxicity assay.
  • the effector cells in the cytotoxicity assay can be stimulated enriched human CD8 positive T cells.
  • Target cells can e.g. be CHO cells transfected with human CDH3.
  • the effector to target cell (E:T) ratio can be chosen as 10:1.
  • the human plasma pool used for this purpose is derived from the blood of healthy donors collected by EDTA coated syringes. Cellular components are removed by centrifugation and the upper plasma phase is collected and subsequently pooled. As control, antibody constructs are diluted immediately prior to the cytotoxicity assay in RPMI-1640 medium. The plasma stability is calculated as ratio of EC50 (after plasma incubation) to EC50 (control). See Example 11.
  • the monomer to dimer conversion of bispecific single chain antibody constructs of the invention is low.
  • the conversion can be measured under different conditions and analyzed by high performance size exclusion chromatography.
  • incubation of the monomeric isoforms of the antibody constructs can be carried out for 7 days at 37°C and concentrations of e.g. 100 ⁇ g/ml or 250 ⁇ g/ml in an incubator.
  • concentrations e.g. 100 ⁇ g/ml or 250 ⁇ g/ml in an incubator.
  • the antibody constructs of the invention show a dimer percentage that is ⁇ 5%, more preferably ⁇ 4%, even more preferably ⁇ 3%, even more preferably ⁇ 2.5%, even more preferably ⁇ 2%, even more preferably ⁇ 1.5%, and most preferably ⁇ 1%. See Example 9.
  • the bispecific single chain antibody constructs of the present invention present with very low dimer conversion after a number of freeze/thaw cycles.
  • the antibody construct monomer is adjusted to a concentration of 250 ⁇ g/ml in generic formulation buffer and subjected to three freeze/thaw cycles (freezing at -80°C for 30 min followed by thawing for 30 min at room temperature), followed by high performance SEC to determine the percentage of initially monomeric antibody construct, which had been converted into dimeric antibody construct.
  • the dimer percentages of the bispecific antibody constructs are ⁇ 5%, more preferably ⁇ 4%, even more preferably ⁇ 3%, even more preferably ⁇ 2.5%, even more preferably ⁇ 2%, even more preferably ⁇ 1.5%, and most preferably ⁇ 1%, for example after three freeze/thaw cycles.
  • the bispecific single chain antibody constructs of the present invention preferably show a favorable thermostability with aggregation temperatures above 50°C or above 52°C, more preferably above 54°C or above 55°C, even more preferably above 56°C or above 57°C, and most preferably above 58°C or above 59°C.
  • the thermostability parameter can be determined in terms of antibody aggregation temperature as follows: Antibody solution at a concentration 250 ⁇ g/ml is transferred into a single use cuvette and placed in a Dynamic Light Scattering device. The sample is heated from 40°C to 70°C at a heating rate of 0.5°C/min with constant acquisition of the measured radius. Increase of radius indicating melting of the protein and aggregation is used to calculate the aggregation temperature of the antibody. See Example 10.
  • temperature melting curves can be determined by Differential Scanning Calorimetry (DSC) to determine intrinsic biophysical protein stabilities of the antibody constructs. These experiments are performed using a MicroCal LLC (Northampton, MA, U.S.A) VP-DSC device.
  • the energy uptake of a sample containing an antibody construct is recorded from 20°C to 90°C compared to a sample containing only the formulation buffer.
  • the antibody constructs are adjusted to a final concentration of 250 ⁇ g/ml e.g. in SEC running buffer.
  • the overall sample temperature is increased stepwise.
  • T energy uptake of the sample and the formulation buffer reference is recorded.
  • the difference in energy uptake Cp (kcal/mole/°C) of the sample minus the reference is plotted against the respective temperature.
  • the melting temperature is defined as the temperature at the first maximum of energy uptake.
  • CDH3xCD3 bispecific single chain antibody contructs of the invention do not cross-react with (i.e., do not bind to) the human CDH3 paralogues CDH1, CDH2, CDH4, and CDH5.
  • CDH3xCD3 bispecific antibodies of the invention do not cross-react with (i.e., do not bind to) the macaque / cyno CDH3 paralogues CDH1, CDH2, CDH4, and CDH5. See Example 6.
  • the CDH3xCD3 bispecific single chain antibody contructs of the invention are also envisaged to have a turbidity (as measured by OD340 after concentration of purified monomeric antibody to 2.5 mg/ml and over night incubation) of ⁇ 0.1, most preferably of ⁇ 0.05. See Example 12.
  • the bispecific single chain antibody construct according to the invention is stable at acidic pH.
  • Recovery of the antibody construct from an ion (e.g., cation) exchange column at pH 5.5 is preferably ⁇ 30%, more preferably ⁇ 40%, more preferably ⁇ 50%, even more preferably ⁇ 60%, even more preferably ⁇ 70%, even more preferably ⁇ 80%, and most preferably ⁇ 90%.
  • bispecific single chain antibody constructs of the present invention exhibit therapeutic efficacy or anti-tumor activity. This can e.g. be assessed in a study as disclosed in Example 14.
  • the tumor growth inhibition T/C [%] is ⁇ 70 or ⁇ 60, more preferably ⁇ 50 or ⁇ 40, even more preferably ⁇ 30 or ⁇ 20 and most preferably ⁇ 10 or ⁇ 5 or even ⁇ 2.5.
  • the invention further provides a polynucleotide / nucleic acid molecule encoding the bispecific single chain antibody construct of the invention.
  • a polynucleotide is a biopolymer composed of 13 or more nucleotide monomers covalently bonded in a chain.
  • DNA such as cDNA
  • RNA such as mRNA
  • Nucleotides are organic molecules that serve as the monomers or subunits of nucleic acid molecules like DNA or RNA.
  • the nucleic acid molecule or polynucleotide can be double stranded and single stranded, linear and circular. It is preferably comprised in a vector which is preferably comprised in a host cell. Said host cell is, e.g. after transformation or transfection with the vector or the polynucleotide of the invention, capable of expressing the antibody construct.
  • the polynucleotide or nucleic acid molecule is operatively linked with control sequences.
  • the genetic code is the set of rules by which information encoded within genetic material (nucleic acids) is translated into proteins. Biological decoding in living cells is accomplished by the ribosome which links amino acids in an order specified by mRNA, using tRNA molecules to carry amino acids and to read the mRNA three nucleotides at a time. The code defines how sequences of these nucleotide triplets, called codons, specify which amino acid will be added next during protein synthesis. With some exceptions, a three-nucleotide codon in a nucleic acid sequence specifies a single amino acid. Because the vast majority of genes are encoded with exactly the same code, this particular code is often referred to as the canonical or standard genetic code. While the genetic code determines the protein sequence for a given coding region, other genomic regions can influence when and where these proteins are produced.
  • the invention provides a vector comprising a polynucleotide / nucleic acid molecule of the invention.
  • a vector is a nucleic acid molecule used as a vehicle to transfer (foreign) genetic material into a cell.
  • the term "vector” encompasses - but is not restricted to - plasmids, viruses, cosmids and artificial chromosomes.
  • engineered vectors comprise an origin of replication, a multicloning site and a selectable marker.
  • the vector itself is generally a nucleotide sequence, commonly a DNA sequence, that comprises an insert (transgene) and a larger sequence that serves as the "backbone” of the vector.
  • Modern vectors may encompass additional features besides the transgene insert and a backbone: promoter, genetic marker, antibiotic resistance, reporter gene, targeting sequence, protein purification tag.
  • Vectors called expression vectors (expression constructs) specifically are for the expression of the transgene in the target cell, and generally have control sequences.
  • control sequences refers to DNA sequences necessary for the expression of an operably linked coding sequence in a particular host organism.
  • the control sequences that are suitable for prokaryotes include a promoter, optionally an operator sequence, and a ribosome binding site.
  • Eukaryotic cells are known to utilize promoters, polyadenylation signals, and enhancers.
  • a nucleic acid is "operably linked" when it is placed into a functional relationship with another nucleic acid sequence.
  • DNA for a presequence or secretory leader is operably linked to DNA for a polypeptide if it is expressed as a preprotein that participates in the secretion of the polypeptide;
  • a promoter or enhancer is operably linked to a coding sequence if it affects the transcription of the sequence; or
  • a ribosome binding site is operably linked to a coding sequence if it is positioned so as to facilitate translation.
  • "operably linked” means that the DNA sequences being linked are contiguous, and, in the case of a secretory leader, contiguous and in reading phase. However, enhancers do not have to be contiguous. Linking is accomplished by ligation at convenient restriction sites. If such sites do not exist, the synthetic oligonucleotide adaptors or linkers are used in accordance with conventional practice.
  • Transfection is the process of deliberately introducing nucleic acid molecules or polynucleotides (including vectors) into target cells. The term is mostly used for non-viral methods in eukaryotic cells. Transduction is often used to describe virus-mediated transfer of nucleic acid molecules or polynucleotides. Transfection of animal cells typically involves opening transient pores or "holes" in the cell membrane, to allow the uptake of material. Transfection can be carried out using calcium phosphate, by electroporation, by cell squeezing or by mixing a cationic lipid with the material to produce liposomes, which fuse with the cell membrane and deposit their cargo inside.
  • transformation is used to describe non-viral transfer of nucleic acid molecules or polynucleotides (including vectors) into bacteria, and also into non-animal eukaryotic cells, including plant cells. Transformation is hence the genetic alteration of a bacterial or non-animal eukaryotic cell resulting from the direct uptake through the cell membrane(s) from its surroundings and subsequent incorporation of exogenous genetic material (nucleic acid molecules). Transformation can be effected by artificial means. For transformation to happen, cells or bacteria must be in a state of competence, which might occur as a time-limited response to environmental conditions such as starvation and cell density.
  • the invention provides a host cell transformed or transfected with the polynucleotide / nucleic acid molecule or with the vector of the invention.
  • the terms "host cell” or “recipient cell” are intended to include any individual cell or cell culture that can be or has/have been recipients of vectors, exogenous nucleic acid molecules, and polynucleotides encoding the antibody construct of the present invention; and/or recipients of the antibody construct itself. The introduction of the respective material into the cell is carried out by way of transformation, transfection and the like.
  • the term "host cell” is also intended to include progeny or potential progeny of a single cell.
  • Suitable host cells include prokaryotic or eukaryotic cells, and also include but are not limited to bacteria, yeast cells, fungi cells, plant cells, and animal cells such as insect cells and mammalian cells, e.g., murine, rat, macaque or human.
  • the bispecific single chain antibody construct of the invention can be produced in bacteria. After expression, the antibody construct of the invention is isolated from the E. coli cell paste in a soluble fraction and can be purified through, e.g., affinity chromatography and/or size exclusion. Final purification can be carried out similar to the process for purifying antibody expressed e.g., in CHO cells.
  • eukaryotic microbes such as filamentous fungi or yeast are suitable cloning or expression hosts for the bispecific single chain antibody construct of the invention.
  • Saccharomyces cerevisiae or common baker's yeast, is the most commonly used among lower eukaryotic host microorganisms.
  • a number of other genera, species, and strains are commonly available and useful herein, such as Schizosaccharomyces pombe, Kluyveromyces hosts such as K. lactis, K. fragilis (ATCC 12424), K. bulgaricus (ATCC 16045), K. wickeramii (ATCC 24178), K. waltii (ATCC 56500), K.
  • drosophilarum ATCC 36906
  • K. thermotolerans K. marxianus
  • yarrowia EP 402 226
  • Pichia pastoris EP 183 070
  • Candida Trichoderma reesia
  • Neurospora crassa Schwanniomyces such as Schwanniomyces occidentalis
  • filamentous fungi such as Neurospora, Penicillium, Tolypocladium, and Aspergillus hosts such as A. nidulans and A. niger.
  • Suitable host cells for the expression of glycosylated bispecific single chain antibody construct of the invention are derived from multicellular organisms.
  • invertebrate cells include plant and insect cells.
  • Numerous baculoviral strains and variants and corresponding permissive insect host cells from hosts such as Spodoptera frugiperda (caterpillar), Aedes aegypti (mosquito), Aedes albopictus (mosquito), Drosophila melanogaster (fruit fly), and Bombyx mori have been identified.
  • a variety of viral strains for transfection are publicly available, e.g., the L-1 variant of Autographa californica NPV and the Bm-5 strain of Bombyx mori NPV, and such viruses may be used as the virus herein according to the present invention, particularly for transfection of Spodoptera frugiperda cells.
  • Plant cell cultures of cotton, corn, potato, soybean, petunia, tomato, Arabidopsis and tobacco can also be used as hosts.
  • Cloning and expression vectors useful in the production of proteins in plant cell culture are known to those of skill in the art. See e.g. Hiatt et al., Nature (1989) 342: 76-78 , Owen et al. (1992) Bio/Technology 10: 790-794 , Artsaenko et al. (1995) The Plant J 8: 745-750 , and Fecker et al. (1996) Plant Mol Biol 32: 979-986 .
  • vertebrate cells have been greatest in vertebrate cells, and propagation of vertebrate cells in culture (tissue culture) has become a routine procedure.
  • useful mammalian host cell lines are monkey kidney CV1 line transformed by SV40 (COS-7, ATCC CRL 1651); human embryonic kidney line (293 or 293 cells subcloned for growth in suspension culture, Graham et al. , J. Gen Virol. 36 : 59 (1977 )); baby hamster kidney cells (BHK, ATCC CCL 10); Chinese hamster ovary cells/-DHFR (CHO, Urlaub et al., Proc. Natl. Acad. Sci. USA 77: 4216 (1980 )); mouse sertoli cells ( TM4, Mather, Biol. Reprod.
  • monkey kidney cells CVI ATCC CCL 70); African green monkey kidney cells (VERO-76, ATCC CRL1587); human cervical carcinoma cells (HELA, ATCC CCL 2); canine kidney cells (MDCK, ATCC CCL 34); buffalo rat liver cells (BRL 3A, ATCC CRL 1442); human lung cells (W138, ATCC CCL 75); human liver cells (Hep G2,1413 8065); mouse mammary tumor (MMT 060562, ATCC CCL5 1); TRI cells ( Mather et al., Annals N. Y Acad. Sci. (1982) 383: 44-68 ); MRC 5 cells; FS4 cells; and a human hepatoma line (Hep G2).
  • the invention provides a process for the production of a bispecific single chain antibody construct of the invention, said process comprising culturing a host cell of the invention under conditions allowing the expression of the antibody construct of the invention and recovering the produced antibody construct from the culture.
  • the term “culturing” refers to the in vitro maintenance, differentiation, growth, proliferation and/or propagation of cells under suitable conditions in a medium.
  • the term “expression” includes any step involved in the production of an antibody construct of the invention including, but not limited to, transcription, post-transcriptional modification, translation, post-translational modification, and secretion.
  • the bispecific single chain antibody construct can be produced intracellularly, in the periplasmic space, or directly secreted into the medium. If the antibody construct is produced intracellularly, as a first step, the particulate debris, either host cells or lysed fragments, are removed, for example, by centrifugation or ultrafiltration. Carter et al., Bio/Technology 10: 163-167 (1992 ) describe a procedure for isolating antibodies which are secreted to the periplasmic space of E. coli. Briefly, cell paste is thawed in the presence of sodium acetate (pH 3.5), EDTA, and phenylmethylsulfonylfluoride (PMSF) over about 30 min.
  • sodium acetate pH 3.5
  • EDTA EDTA
  • PMSF phenylmethylsulfonylfluoride
  • Cell debris can be removed by centrifugation.
  • supernatants from such expression systems are generally first concentrated using a commercially available protein concentration filter, for example, an Amicon or Millipore Pellicon ultrafiltration unit.
  • a protease inhibitor such as PMSF may be included in any of the foregoing steps to inhibit proteolysis and antibiotics may be included to prevent the growth of adventitious contaminants.
  • the bispecific single chain antibody construct of the invention prepared from the host cells can be recovered or purified using, for example, hydroxylapatite chromatography, gel electrophoresis, dialysis, and affinity chromatography.
  • Other techniques for protein purification such as fractionation on an ion-exchange column, ethanol precipitation, Reverse Phase HPLC, chromatography on silica, chromatography on heparin SEPHAROSE TM , chromatography on an anion or cation exchange resin (such as a polyaspartic acid column), chromato-focusing, SDS-PAGE, and ammonium sulfate precipitation are also available depending on the antibody to be recovered.
  • the antibody construct of the invention comprises a CH3 domain
  • the Bakerbond ABX resin J.T. Baker, Phillipsburg, NJ
  • Affinity chromatography is a preferred purification technique.
  • the matrix to which the affinity ligand is attached is most often agarose, but other matrices are available.
  • Mechanically stable matrices such as controlled pore glass or poly (styrenedivinyl) benzene allow for faster flow rates and shorter processing times than can be achieved with agarose.
  • the invention provides a pharmaceutical composition comprising a bispecific single chain antibody construct of the invention or a bispecific single chain antibody construct produced according to the process of the invention.
  • the term "pharmaceutical composition” relates to a composition which is suitable for administration to a patient, preferably a human patient.
  • the particularly preferred pharmaceutical composition of this invention comprises one or a plurality of the antibody construct(s) of the invention, preferably in a therapeutically effective amount.
  • the pharmaceutical composition further comprises suitable formulations of one or more (pharmaceutically effective) carriers, stabilizers, excipients, diluents, solubilizers, surfactants, emulsifiers, preservatives and/or adjuvants.
  • Acceptable constituents of the composition are preferably nontoxic to recipients at the dosages and concentrations employed.
  • Pharmaceutical compositions of the invention include, but are not limited to, liquid, frozen, and lyophilized compositions.
  • compositions may comprise a pharmaceutically acceptable carrier.
  • pharmaceutically acceptable carrier means any and all aqueous and non-aqueous solutions, sterile solutions, solvents, buffers, e.g. phosphate buffered saline (PBS) solutions, water, suspensions, emulsions, such as oil/water emulsions, various types of wetting agents, liposomes, dispersion media and coatings, which are compatible with pharmaceutical administration, in particular with parenteral administration.
  • PBS phosphate buffered saline
  • compositions comprising the antibody construct of the invention and further one or more excipients such as those illustratively described in this section and elsewhere herein.
  • Excipients can be used in the invention in this regard for a wide variety of purposes, such as adjusting physical, chemical, or biological properties of formulations, such as adjustment of viscosity, and or processes of the invention to improve effectiveness and or to stabilize such formulations and processes against degradation and spoilage due to, for instance, stresses that occur during manufacturing, shipping, storage, pre-use preparation, administration, and thereafter.
  • the pharmaceutical composition may contain formulation materials for the purpose of modifying, maintaining or preserving, e.g., the pH, osmolarity, viscosity, clarity, color, isotonicity, odor, sterility, stability, rate of dissolution or release, adsorption or penetration of the composition (see, REMINGTON'S PHARMACEUTICAL SCIENCES, 18" Edition, (A.R. Genrmo, ed.), 1990, Mack Publishing Company ).
  • suitable formulation materials may include, but are not limited to:
  • amino acid can act as a buffer, a stabilizer and/or an antioxidant
  • mannitol can act as a bulking agent and/or a tonicity enhancing agent
  • sodium chloride can act as delivery vehicle and/or tonicity enhancing agent; etc.
  • composition of the invention might comprise, in addition to the polypeptide of the invention defined herein, further biologically active agents, depending on the intended use of the composition.
  • agents might be drugs acting on the gastrointestinal system, drugs acting as cytostatica, drugs preventing hyperurikemia, drugs inhibiting immunoreactions (e.g. corticosteroids), drugs modulating the inflammatory response, drugs acting on the circulatory system and/or agents such as cytokines known in the art.
  • the antibody construct of the present invention is applied in a co-therapy, i.e., in combination with another anti-cancer medicament.
  • the optimal pharmaceutical composition will be determined by one skilled in the art depending upon, for example, the intended route of administration, delivery format and desired dosage. See, for example, REMINGTON'S PHARMACEUTICAL SCIENCES, supra. In certain embodiments, such compositions may influence the physical state, stability, rate of in vivo release and rate of in vivo clearance of the antibody construct of the invention.
  • the primary vehicle or carrier in a pharmaceutical composition may be either aqueous or non-aqueous in nature.
  • a suitable vehicle or carrier may be water for injection, physiological saline solution or artificial cerebrospinal fluid, possibly supplemented with other materials common in compositions for parenteral administration.
  • Neutral buffered saline or saline mixed with serum albumin are further exemplary vehicles.
  • the antibody construct of the invention compositions may be prepared for storage by mixing the selected composition having the desired degree of purity with optional formulation agents (REMINGTON'S PHARMACEUTICAL SCIENCES, supra ) in the form of a lyophilized cake or an aqueous solution.
  • the antibody construct of the invention may be formulated as a lyophilizate using appropriate excipients such as sucrose.
  • the therapeutic compositions for use in this invention may be provided in the form of a pyrogen-free, parenterally acceptable aqueous solution comprising the desired antibody construct of the invention in a pharmaceutically acceptable vehicle.
  • a particularly suitable vehicle for parenteral injection is sterile distilled water in which the antibody construct of the invention is formulated as a sterile, isotonic solution, properly preserved.
  • the preparation can involve the formulation of the desired molecule with an agent, such as injectable microspheres, bio-erodible particles, polymeric compounds (such as polylactic acid or polyglycolic acid), beads or liposomes, that may provide controlled or sustained release of the product which can be delivered via depot injection.
  • hyaluronic acid may also be used, having the effect of promoting sustained duration in the circulation.
  • implantable drug delivery devices may be used to introduce the desired antibody construct.
  • sustained- or controlled-delivery / release formulations include formulations involving the antibody construct of the invention in sustained- or controlled-delivery / release formulations.
  • Techniques for formulating a variety of other sustained- or controlled-delivery means, such as liposome carriers, bio-erodible microparticles or porous beads and depot injections, are also known to those skilled in the art. See, for example, International Patent Application No. PCT/US93/00829 , which describes controlled release of porous polymeric microparticles for delivery of pharmaceutical compositions.
  • Sustained-release preparations may include semipermeable polymer matrices in the form of shaped articles, e.g., films, or microcapsules.
  • Sustained release matrices may include polyesters, hydrogels, polylactides (as disclosed in U.S. Pat. No. 3,773,919 and European Patent Application Publication No. EP 058481 ), copolymers of L-glutamic acid and gamma ethyl-L-glutamate ( Sidman et al., 1983, Biopolymers 2:547-556 ), poly (2-hydroxyethyl-methacrylate) ( Langer et al., 1981, J. Biomed. Mater. Res. 15:167-277 and Langer, 1982, Chem. Tech.
  • Sustained release compositions may also include liposomes that can be prepared by any of several methods known in the art. See, e.g., Eppstein et al., 1985, Proc. Natl. Acad. Sci. U.S.A. 82:3688-3692 ; European Patent Application Publication Nos. EP 036,676 ; EP 088,046 and EP 143,949 .
  • the bispecific single chain antibody construct may also be entrapped in microcapsules prepared, for example, by coacervation techniques or by interfacial polymerization (for example, hydroxymethylcellulose or gelatine-microcapsules and poly (methylmethacylate) microcapsules, respectively), in colloidal drug delivery systems (for example, liposomes, albumin microspheres, microemulsions, nanoparticles and nanocapsules), or in macroemulsions.
  • colloidal drug delivery systems for example, liposomes, albumin microspheres, microemulsions, nanoparticles and nanocapsules
  • compositions used for in vivo administration are typically provided as sterile preparations. Sterilization can be accomplished by filtration through sterile filtration membranes. When the composition is lyophilized, sterilization using this method may be conducted either prior to or following lyophilization and reconstitution.
  • Compositions for parenteral administration can be stored in lyophilized form or in a solution. Parenteral compositions generally are placed into a container having a sterile access port, for example, an intravenous solution bag or vial having a stopper pierceable by a hypodermic injection needle.
  • Another aspect of the invention includes self-buffering antibody construct of the invention formulations, which can be used as pharmaceutical compositions, as described in international patent application WO 06138181A2 ( PCT/US2006/022599 ).
  • a variety of expositions are available on protein stabilization and formulation materials and methods useful in this regard, such as Arakawa et al., "Solvent interactions in pharmaceutical formulations," Pharm Res. 8(3): 285-91 (1991 ); Kendrick et al., "Physical stabilization of proteins in aqueous solution” in: RATIONAL DESIGN OF STABLE PROTEIN FORMULATIONS: THEORY AND PRACTICE, Carpenter and Manning, eds. Pharmaceutical Biotechnology.
  • Salts may be used in accordance with certain embodiments of the invention to, for example, adjust the ionic strength and/or the isotonicity of a formulation and/or to improve the solubility and/or physical stability of a protein or other ingredient of a composition in accordance with the invention.
  • ions can stabilize the native state of proteins by binding to charged residues on the protein's surface and by shielding charged and polar groups in the protein and reducing the strength of their electrostatic interactions, attractive, and repulsive interactions.
  • Ions also can stabilize the denatured state of a protein by binding to, in particular, the denatured peptide linkages (--CONH) of the protein.
  • ionic interaction with charged and polar groups in a protein also can reduce intermolecular electrostatic interactions and, thereby, prevent or reduce protein aggregation and insolubility.
  • Ionic species differ significantly in their effects on proteins.
  • a number of categorical rankings of ions and their effects on proteins have been developed that can be used in formulating pharmaceutical compositions in accordance with the invention.
  • One example is the Hofmeister series, which ranks ionic and polar non-ionic solutes by their effect on the conformational stability of proteins in solution.
  • Stabilizing solutes are referred to as “kosmotropic”.
  • Destabilizing solutes are referred to as "chaotropic”.
  • Kosmotropes commonly are used at high concentrations (e.g., >1 molar ammonium sulfate) to precipitate proteins from solution (“salting-out”).
  • Chaotropes commonly are used to denture and/or to solubilize proteins ("salting-in”).
  • the relative effectiveness of ions to "salt-in” and "salt-out” defines their position in the Hofmeister series.
  • Free amino acids can be used in the bispecific single chain antibody construct of the invention formulations in accordance with various embodiments of the invention as bulking agents, stabilizers, and antioxidants, as well as other standard uses.
  • Lysine, proline, serine, and alanine can be used for stabilizing proteins in a formulation.
  • Glycine is useful in lyophilization to ensure correct cake structure and properties.
  • Arginine may be useful to inhibit protein aggregation, in both liquid and lyophilized formulations.
  • Methionine is useful as an antioxidant.
  • Polyols include sugars, e.g., mannitol, sucrose, and sorbitol and polyhydric alcohols such as, for instance, glycerol and propylene glycol, and, for purposes of discussion herein, polyethylene glycol (PEG) and related substances.
  • Polyols are kosmotropic. They are useful stabilizing agents in both liquid and lyophilized formulations to protect proteins from physical and chemical degradation processes. Polyols also are useful for adjusting the tonicity of formulations.
  • polyols useful in select embodiments of the invention is mannitol, commonly used to ensure structural stability of the cake in lyophilized formulations. It ensures structural stability to the cake.
  • a lyoprotectant e.g., sucrose.
  • Sorbitol and sucrose are among preferred agents for adjusting tonicity and as stabilizers to protect against freeze-thaw stresses during transport or the preparation of bulks during the manufacturing process.
  • Reducing sugars which contain free aldehyde or ketone groups, such as glucose and lactose, can glycate surface lysine and arginine residues. Therefore, they generally are not among preferred polyols for use in accordance with the invention.
  • sugars that form such reactive species such as sucrose, which is hydrolyzed to fructose and glucose under acidic conditions, and consequently engenders glycation, also is not among preferred polyols of the invention in this regard.
  • PEG is useful to stabilize proteins and as a cryoprotectant and can be used in the invention in this regard.
  • Embodiments of the bispecific single chain antibody construct of the invention formulations further comprise surfactants.
  • Protein molecules may be susceptible to adsorption on surfaces and to denaturation and consequent aggregation at air-liquid, solid-liquid, and liquid-liquid interfaces. These effects generally scale inversely with protein concentration. These deleterious interactions generally scale inversely with protein concentration and typically are exacerbated by physical agitation, such as that generated during the shipping and handling of a product.
  • Surfactants routinely are used to prevent, minimize, or reduce surface adsorption.
  • Useful surfactants in the invention in this regard include polysorbate 20, polysorbate 80, other fatty acid esters of sorbitan polyethoxylates, and poloxamer 188.
  • Surfactants also are commonly used to control protein conformational stability. The use of surfactants in this regard is protein-specific since, any given surfactant typically will stabilize some proteins and destabilize others.
  • Polysorbates are susceptible to oxidative degradation and often, as supplied, contain sufficient quantities of peroxides to cause oxidation of protein residue side-chains, especially methionine. Consequently, polysorbates should be used carefully, and when used, should be employed at their lowest effective concentration. In this regard, polysorbates exemplify the general rule that excipients should be used in their lowest effective concentrations.
  • Embodiments of the bispecific single chain antibody construct of the invention formulations further comprise one or more antioxidants.
  • Antioxidant excipients can be used as well to prevent oxidative degradation of proteins.
  • useful antioxidants in this regard are reducing agents, oxygen/free-radical scavengers, and chelating agents.
  • Antioxidants for use in therapeutic protein formulations in accordance with the invention preferably are water-soluble and maintain their activity throughout the shelf life of a product.
  • EDTA is a preferred antioxidant in accordance with the invention in this regard.
  • Antioxidants can damage proteins. For instance, reducing agents, such as glutathione in particular, can disrupt intramolecular disulfide linkages.
  • antioxidants for use in the invention are selected to, among other things, eliminate or sufficiently reduce the possibility of themselves damaging proteins in the formulation.
  • Formulations in accordance with the invention may include metal ions that are protein cofactors and that are necessary to form protein coordination complexes, such as zinc necessary to form certain insulin suspensions. Metal ions also can inhibit some processes that degrade proteins. However, metal ions also catalyze physical and chemical processes that degrade proteins. Magnesium ions (10-120 mM) can be used to inhibit isomerization of aspartic acid to isoaspartic acid. Ca +2 ions (up to 100 mM) can increase the stability of human deoxyribonuclease. Mg +2 , Mn +2 , and Zn +2 , however, can destabilize rhDNase.
  • Ca +2 and Sr +2 can stabilize Factor VIII, it can be destabilized by Mg +2 , Mn +2 and Zn +2 , Cu +2 and Fe +2 , and its aggregation can be increased by Al +3 ions.
  • Embodiments of the bispecific single chain antibody construct of the invention formulations further comprise one or more preservatives.
  • Preservatives are necessary when developing multi-dose parenteral formulations that involve more than one extraction from the same container. Their primary function is to inhibit microbial growth and ensure product sterility throughout the shelf-life or term of use of the drug product. Commonly used preservatives include benzyl alcohol, phenol and m-cresol. Although preservatives have a long history of use with small-molecule parenterals, the development of protein formulations that includes preservatives can be challenging. Preservatives almost always have a destabilizing effect (aggregation) on proteins, and this has become a major factor in limiting their use in multi-dose protein formulations.
  • the bispecific single chain antibody constructs disclosed herein may also be formulated as immuno-liposomes.
  • a "liposome” is a small vesicle composed of various types of lipids, phospholipids and/or surfactant which is useful for delivery of a drug to a mammal. The components of the liposome are commonly arranged in a bilayer formation, similar to the lipid arrangement of biological membranes. Liposomes containing the antibody construct are prepared by methods known in the art, such as described in Epstein et al., Proc. Natl. Acad. Sci. USA, 82: 3688 (1985 ); Hwang et al. , Proc. Natl Acad. Sci. USA, 77: 4030 (1980 ); US Pat.
  • Liposomes with enhanced circulation time are disclosed in US Patent No. 5,013, 556 .
  • Particularly useful liposomes can be generated by the reverse phase evaporation method with a lipid composition comprising phosphatidylcholine, cholesterol and PEG-derivatized phosphatidylethanolamine (PEG-PE). Liposomes are extruded through filters of defined pore size to yield liposomes with the desired diameter.
  • Fab' fragments of the antibody construct of the present invention can be conjugated to the liposomes as described in Martin et al. J. Biol. Chem.
  • chemotherapeutic agent is optionally contained within the liposome. See Gabizon et al. J. National Cancer Inst. 81 (19) 1484 (1989 ).
  • the pharmaceutical composition may be stored in sterile vials as a solution, suspension, gel, emulsion, solid, crystal, or as a dehydrated or lyophilized powder.
  • Such formulations may be stored either in a ready-to-use form or in a form (e.g., lyophilized) that is reconstituted prior to administration.
  • the biological activity of the pharmaceutical composition defined herein can be determined for instance by cytotoxicity assays, as described in the following examples, in WO 99/54440 or by Schlereth et al. (Cancer Immunol. Immunother. 20 (2005), 1-12 ).
  • "Efficacy” or " in vivo efficacy” as used herein refers to the response to therapy by the pharmaceutical composition of the invention, using e.g. standardized NCI response criteria.
  • the success or in vivo efficacy of the therapy using a pharmaceutical composition of the invention refers to the effectiveness of the composition for its intended purpose, i.e. the ability of the composition to cause its desired effect, i.e. depletion of pathologic cells, e.g. tumor cells.
  • the in vivo efficacy may be monitored by established standard methods for the respective disease entities including, but not limited to white blood cell counts, differentials, Fluorescence Activated Cell Sorting, bone marrow aspiration.
  • various disease specific clinical chemistry parameters and other established standard methods may be used.
  • computer-aided tomography, X-ray, nuclear magnetic resonance tomography e.g.
  • positron-emission tomography scanning white blood cell counts, differentials, Fluorescence Activated Cell Sorting, bone marrow aspiration, lymph node biopsies/histologies, and various lymphoma specific clinical chemistry parameters (e.g. lactate dehydrogenase) and other established standard methods may be used.
  • a pharmacokinetic profile of the drug candidate i.e. a profile of the pharmacokinetic parameters that affect the ability of a particular drug to treat a given condition
  • Pharmacokinetic parameters of the drug influencing the ability of a drug for treating a certain disease entity include, but are not limited to: half-life, volume of distribution, hepatic first-pass metabolism and the degree of blood serum binding.
  • the efficacy of a given drug agent can be influenced by each of the parameters mentioned above.
  • Hepatic first-pass metabolism is meant the propensity of a drug to be metabolized upon first contact with the liver, i.e. during its first pass through the liver.
  • Volume of distribution means the degree of retention of a drug throughout the various compartments of the body, like e.g. intracellular and extracellular spaces, tissues and organs, etc. and the distribution of the drug within these compartments.
  • Degree of blood serum binding means the propensity of a drug to interact with and bind to blood serum proteins, such as albumin, leading to a reduction or loss of biological activity of the drug.
  • Pharmacokinetic parameters also include bioavailability, lag time (Tlag), Tmax, absorption rates, more onset and/or Cmax for a given amount of drug administered.
  • Bioavailability means the amount of a drug in the blood compartment.
  • Lag time means the time delay between the administration of the drug and its detection and measurability in blood or plasma.
  • Tmax is the time after which maximal blood concentration of the drug is reached, and
  • Cmax is the blood concentration maximally obtained with a given drug. The time to reach a blood or tissue concentration of the drug which is required for its biological effect is influenced by all parameters.
  • the invention provides the bispecific single chain antibody construct of the invention or the antibody construct produced according to the process of the invention for use in the prevention, treatment or amelioration of a cancer.
  • treatment refers to both therapeutic treatment and prophylactic or preventative measures.
  • Treatment includes the application or administration of the formulation to the body, an isolated tissue, or cell from a patient who has a disease/disorder, a symptom of a disease/disorder, or a predisposition toward a disease/disorder, with the purpose to cure, heal, alleviate, relieve, alter, remedy, ameliorate, improve, or affect the disease, the symptom of the disease, or the predisposition toward the disease.
  • amelioration refers to any improvement of the disease state of a patient having one of the types of (metastatic) tumors or cancers as specified herein, by the administration of a bispecific single chain antibody construct according to the invention to a subject in need thereof. Such an improvement may also be seen as a slowing or stopping of the progression of the (metastatic) tumor or cancer of the patient.
  • prevention means the avoidance of the occurrence or re-occurrence of a patient having one of the types of (metastatic) tumors or cancers as specified herein, by the administration of an antibody construct according to the invention to a subject in need thereof.
  • disease refers to any condition that would benefit from treatment with the antibody construct or the pharmaceutic composition described herein. This includes chronic and acute disorders or diseases including those pathological conditions that predispose the mammal to the disease in question.
  • Neoplasm is an abnormal growth of tissue, usually but not always forming a mass. When also forming a mass, it is commonly referred to as a "tumor". Neoplasms or tumors can be benign, potentially malignant (pre-cancerous), or malignant. Malignant neoplasms are commonly called cancer. They usually invade and destroy the surrounding tissue and may form metastases, i.e., they spread to other parts, tissues or organs of the body. Hence, the term “metatstatic cancer” encompasses metastases to other tissues or organs than the one of the original tumor. Lymphomas and leukemias are lymphoid neoplasms.
  • the invention provides the bispecific single chain antibody construct of the invention or the bispecific single chain antibody construct produced according to the process of the invention for use in the prevention, treatment or amelioration of a cancer
  • the cancer is selected from the group consisting of lung carcinoma, head and neck carcinoma, a primary or secondary CNS tumor, a primary or secondary brain tumor, primary CNS lymphoma, spinal axis tumors, brain stem glioma, glioblastoma, pituitary adenoma, adrenocortical cancer, esophagus carcinoma, colon cancer, breast cancer, ovarian cancer, NSCLC (non-small cell lung cancer), SCLC (small cell lung cancer), endometrial cancer, cervical cancer, uterine cancer, transitional cell carcinoma, bone cancer, pancreatic cancer, skin cancer, cutaneous or intraocular melanoma, hepatic cancer, biliary duct cancer, gall bladder cancer, kidney cancer, rectal cancer, cancer of the anal region, stomach cancer, gastrointestinal
  • the cancer is
  • the invention provides the bispecific single chain antibody construct of the invention or the antibody construct produced according to the process of the invention for use in the prevention, treatment or amelioration of a cancer, wherein the cancer is a (metastatic) squamous cell carcinoma.
  • subject in need or those "in need of treatment” includes those already with the disorder, as well as those in which the disorder is to be prevented.
  • subject in need or patient includes human and other mammalian subjects that receive either prophylactic or therapeutic treatment.
  • the bispecific single chain antibody construct of the invention will generally be designed for specific routes and methods of administration, for specific dosages and frequencies of administration, for specific treatments of specific diseases, with ranges of bio-availability and persistence, among other things.
  • the materials of the composition are preferably formulated in concentrations that are acceptable for the site of administration.
  • Formulations and compositions thus may be designed in accordance with the invention for delivery by any suitable route of administration.
  • routes of administration include, but are not limited to
  • compositions and the bispecific single chain antibody construct of this invention are particularly useful for parenteral administration, e.g., subcutaneous or intravenous delivery, for example by injection such as bolus injection, or by infusion such as continuous infusion.
  • Pharmaceutical compositions may be administered using a medical device. Examples of medical devices for administering pharmaceutical compositions are described in U.S. Patent Nos.
  • the present invention provides for an uninterrupted administration of the suitable composition.
  • uninterrupted or substantially uninterrupted, i.e. continuous administration may be realized by a small pump system worn by the patient for metering the influx of therapeutic agent into the body of the patient.
  • the pharmaceutical composition comprising the bispecific single chain antibody construct of the invention can be administered by using said pump systems.
  • Such pump systems are generally known in the art, and commonly rely on periodic exchange of cartridges containing the therapeutic agent to be infused. When exchanging the cartridge in such a pump system, a temporary interruption of the otherwise uninterrupted flow of therapeutic agent into the body of the patient may ensue.
  • the phase of administration prior to cartridge replacement and the phase of administration following cartridge replacement would still be considered within the meaning of the pharmaceutical means and methods of the invention together make up one "uninterrupted administration" of such therapeutic agent.
  • the continuous or uninterrupted administration of the bispecific single chain antibody constructs of the invention may be intravenous or subcutaneous by way of a fluid delivery device or small pump system including a fluid driving mechanism for driving fluid out of a reservoir and an actuating mechanism for actuating the driving mechanism.
  • Pump systems for subcutaneous administration may include a needle or a cannula for penetrating the skin of a patient and delivering the suitable composition into the patient's body. Said pump systems may be directly fixed or attached to the skin of the patient independently of a vein, artery or blood vessel, thereby allowing a direct contact between the pump system and the skin of the patient.
  • the pump system can be attached to the skin of the patient for 24 hours up to several days.
  • the pump system may be of small size with a reservoir for small volumes. As a non-limiting example, the volume of the reservoir for the suitable pharmaceutical composition to be administered can be between 0.1 and 50 ml.
  • the continuous administration may also be transdermal by way of a patch worn on the skin and replaced at intervals.
  • a patch worn on the skin and replaced at intervals One of skill in the art is aware of patch systems for drug delivery suitable for this purpose. It is of note that transdermal administration is especially amenable to uninterrupted administration, as exchange of a first exhausted patch can advantageously be accomplished simultaneously with the placement of a new, second patch, for example on the surface of the skin immediately adjacent to the first exhausted patch and immediately prior to removal of the first exhausted patch. Issues of flow interruption or power cell failure do not arise.
  • the lyophilized material is first reconstituted in an appropriate liquid prior to administration.
  • the lyophilized material may be reconstituted in, e.g., bacteriostatic water for injection (BWFI), physiological saline, phosphate buffered saline (PBS), or the same formulation the protein had been in prior to lyophilization.
  • BWFI bacteriostatic water for injection
  • PBS phosphate buffered saline
  • compositions of the present invention can be administered to the subject at a suitable dose which can be determined e.g. by dose escalating studies by administration of increasing doses of the antibody construct of the invention exhibiting cross-species specificity described herein to non-chimpanzee primates, for instance macaques.
  • the antibody construct of the invention exhibiting cross-species specificity described herein can be advantageously used in identical form in preclinical testing in non-chimpanzee primates and as drug in humans.
  • the dosage regimen will be determined by the attending physician and clinical factors. As is well known in the medical arts, dosages for any one patient depend upon many factors, including the patient's size, body surface area, age, the particular compound to be administered, sex, time and route of administration, general health, and other drugs being administered concurrently.
  • an effective dose or "effective dosage” is defined as an amount sufficient to achieve or at least partially achieve the desired effect.
  • therapeutically effective dose is defined as an amount sufficient to cure or at least partially arrest the disease and its complications in a patient already suffering from the disease. Amounts or doses effective for this use will depend on the condition to be treated (the indication), the delivered antibody construct, the therapeutic context and objectives, the severity of the disease, prior therapy, the patient's clinical history and response to the therapeutic agent, the route of administration, the size (body weight, body surface or organ size) and/or condition (the age and general health) of the patient, and the general state of the patient's own immune system. The proper dose can be adjusted according to the judgment of the attending physician such that it can be administered to the patient once or over a series of administrations, and in order to obtain the optimal therapeutic effect.
  • a typical dosage may range from about 0.1 ⁇ g/kg to up to about 30 mg/kg or more, depending on the factors mentioned above. In specific embodiments, the dosage may range from 1.0 ⁇ g/kg up to about 20 mg/kg, optionally from 10 ⁇ g/kg up to about 10 mg/kg or from 100 ⁇ g/kg up to about 5 mg/kg.
  • a therapeutic effective amount of a bispecific single chain antibody construct of the invention preferably results in a decrease in severity of disease symptoms, an increase in frequency or duration of disease symptom-free periods or a prevention of impairment or disability due to the disease affliction.
  • a therapeutically effective amount of the antibody construct of the invention e.g. an anti-CDH3/anti-CD3 antibody construct, preferably inhibits cell growth or tumor growth by at least about 20%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, or at least about 90% relative to untreated patients.
  • the ability of a compound to inhibit tumor growth may be evaluated in an animal model predictive of efficacy in human tumors.
  • the pharmaceutical composition can be administered as a sole therapeutic or in combination with additional therapies such as anti-cancer therapies as needed, e.g. other proteinaceous and non-proteinaceous drugs.
  • additional therapies such as anti-cancer therapies as needed, e.g. other proteinaceous and non-proteinaceous drugs.
  • These drugs may be administered simultaneously with the composition comprising the antibody construct of the invention as defined herein or separately before or after administration of said antibody construct in timely defined intervals and doses.
  • effective and non-toxic dose refers to a tolerable dose of an inventive antibody construct which is high enough to cause depletion of pathologic cells, tumor elimination, tumor shrinkage or stabilization of disease without or essentially without major toxic effects.
  • effective and non-toxic doses may be determined e.g. by dose escalation studies described in the art and should be below the dose inducing severe adverse side events (dose limiting toxicity, DLT).
  • toxicity refers to the toxic effects of a drug manifested in adverse events or severe adverse events. These side events might refer to a lack of tolerability of the drug in general and/or a lack of local tolerance after administration. Toxicity could also include teratogenic or carcinogenic effects caused by the drug.
  • safety means the administration of a drug without inducing severe adverse events directly after administration (local tolerance) and during a longer period of application of the drug.
  • Safety can be evaluated e.g. at regular intervals during the treatment and follow-up period. Measurements include clinical evaluation, e.g. organ manifestations, and screening of laboratory abnormalities. Clinical evaluation may be carried out and deviations to normal findings recorded/coded according to NCI-CTC and/or MedDRA standards. Organ manifestations may include criteria such as allergy/immunology, blood/bone marrow, cardiac arrhythmia, coagulation and the like, as set forth e.g.
  • CCAE Common Terminology Criteria for adverse events v3.0
  • Laboratory parameters which may be tested include for instance hematology, clinical chemistry, coagulation profile and urine analysis and examination of other body fluids such as serum, plasma, lymphoid or spinal fluid, liquor and the like.
  • Safety can thus be assessed e.g. by physical examination, imaging techniques (i.e. ultrasound, x-ray, CT scans, Magnetic Resonance Imaging (MRI), other measures with technical devices (i.e. electrocardiogram), vital signs, by measuring laboratory parameters and recording adverse events.
  • imaging techniques i.e. ultrasound, x-ray, CT scans, Magnetic Resonance Imaging (MRI), other measures with technical devices (i.e. electrocardiogram), vital signs
  • adverse events in non-chimpanzee primates in the uses and methods according to the invention may be examined by histopathological and/or histochemical methods.
  • the invention provides a kit comprising a bispecific single chain antibody construct of the invention, an antibody construct produced according to the process of the invention, a vector of the invention, and/or a host cell of the invention.
  • kit means two or more components - one of which corresponding to the bispecific single chain antibody construct, the pharmaceutical composition, the vector or the host cell of the invention - packaged together in a container, recipient or otherwise.
  • a kit can hence be described as a set of products and/or utensils that are sufficient to achieve a certain goal, which can be marketed as a single unit.
  • the kit may comprise one or more recipients (such as vials, ampoules, containers, syringes, bottles, bags) of any appropriate shape, size and material (preferably waterproof, e.g. plastic or glass) containing the antibody construct or the pharmaceutical composition of the present invention in an appropriate dosage for administration (see above).
  • the kit may additionally contain directions for use (e.g. in the form of a leaflet or instruction manual), means for administering the antibody construct of the present invention such as a syringe, pump, infuser or the like, means for reconstituting the antibody construct of the invention and/or means for diluting the antibody construct of the invention.
  • kits for a single-dose administration unit may also contain a first recipient comprising a dried / lyophilized bispecific single chain antibody construct and a second recipient comprising an aqueous formulation.
  • kits containing single-chambered and multi-chambered pre-filled syringes are provided.
  • the sequence of the respective five extracellular domains Dom1 to Dom5 (or D1 to D5) and of their sub-domains (A, B and C) of human CDH3 was replaced by the corresponding murine sequence.
  • sub-domain D1A is located in amino acid positions 108-143 of SEQ ID NO: 1.
  • SEQ ID NO: 1 The same similarly applies for all other domains listed above.
  • chimeric extracellular domains For expression in CHO cells, the coding sequence of the above described chimeric extracellular domains was followed in frame by the coding sequence of an artificial Ser/Gly-linker followed by a domain derived from the transmembrane / intracellular domain of human EpCAM (amino acids 266-314 of the sequence as published in GenBank accession number NM_002354 ). All chimeric constructs comprised the N-terminal signal sequence (signal peptide) and the pro-peptide.
  • cyno cynomolgus macaque
  • mouse and human/mouse chimeric CDH3 the respective coding sequences of human CDH3 (SEQ ID NO: 2, see also GeneBank accession number NM_001793 ), cyno CDH3 (SEQ ID NO: 6), mouse CDH3 (SEQ ID NO: 10, see also GeneBank accession number NM_001037809 ) and of the 20 human-mouse CDH3 chimeras (see above) were cloned into a plasmid designated pEF-DHFR (pEF-DHFR is described in Haut et al. Cancer Immunol Immunother 50 (2001) 141-150 ).
  • the coding sequence of macaque CDH3 was obtained by standard cloning using a cynomolgus spleen cDNA library (BioChain) and human sequence specific oligonucleotides (5' GGCCCGCCGTCGCGGCAGC 3'; 5' CTCCTTCTCCAGGTTTGCTGGC 3'; 5' AACTG AGACCCCTTGGAGATGC 3'; 5' TAGTCGTCCTCCCCGCCACC 3'; 5' GGAGGGTGGGA CAAACACAGG 3'; 5' ACGTTGAAGTGACCAACGAGGC 3') hybridizing in the untranslated region or conserved sequence regions of human CDH3 mRNA transcript (NM_001793).
  • CDH3 human, murine and the chimeric constructs
  • CHO cells The expression of CDH3 (human, murine and the chimeric constructs) on CHO cells was verified in a FACS assay using a monoclonal mouse IgG1 anti-human CDH3 antibody which is murine cross-reactive. Bound monoclonal antibody was detected with an anti-mouse IgG Fcy-PE. As negative control, cells were incubated with PBS / 2% FCS instead of the first antibody. The samples were measured by flow cytometry. The results are shown in Figure 3 . The expression of human and cyno CDH3 on CHO cells (see Example 5) was detected with PE-conjugated R&D 861-P.
  • Figure 4A shows bispecific single chain antibody constructs (binders) which recognize the extracellular domain D1 of human CDH3, and more precisely, the sub-domain D1B (loss of the FACS signal in the respective chimeric CDH3 constructs).
  • the binder denominated CDH3-6 is the parental binder for CDH3-4.
  • the binder denominated CDH3-10 is the parental binder for CDH3-1, CDH3-2 and CDH3-3.
  • Figure 4B shows binders which recognize the extracellular domain D2 of human CDH3, and more precisely, the sub-domain D2C.
  • the binder denominated CDH3-21 is the parental binder for CDH3-11, CDH3-12 and CDH3-14.
  • the binder denominated CDH3-23 is the parental binder for CDH3-13.
  • Figure 4C shows binders which recognize the extracellular domain D3 of human CDH3, and more precisely, the sub-domain D3A.
  • binder CDH3-32 furthermore binds to the sub-domain D3C.
  • the binder denominated CDH3-32 is the parental binder for CDH3-25, CDH3-26 and CDH3-27.
  • the binder denominated CDH3-33 is the parental binder for CDH3-24.
  • the term "parental binder" means in this context that these binders were developed further in order to generate or to obtain optimized binders.
  • the binders CDH3-11, CDH3-12, CDH3-13 and CDH3-14 have as well been subjected to the epitope clustering analysis, and they have been shown to recognize the extracellular domain D2 of human CDH3, and more precisely, the sub-domain D2C (data not shown).
  • the same analysis was furthermore carried out with binders CDH3-24, CDH3-25, CDH3-26 and CDH3-27. These binders recognized the extracellular domain D3 of human CDH3, and more precisely, the sub-domain D3A (data not shown).
  • CDH3 human and cyno CDH3, respectively
  • HALB human albumin
  • CM5 Sensor Chips (GE Healthcare) were immobilized with approximately 600-800 RU of the respective recombinant antigen using acetate buffer pH 4.5 according to the manufacturer's manual.
  • the CDH3xCD3 bispecific antibody samples were loaded in five concentrations: 50 nM, 25 nM, 12.5 nM, 6.25 nM and 3.13 nM diluted in HBS-EP running buffer (GE Healthcare). Flow rate was 30 ⁇ l/min for 3 min, then HBS-EP running buffer was applied for 8 min to 20 min again at a flow rate of 30 ⁇ l/ml. Regeneration of the chip was performed using 10 mM glycine 10 mM NaCl pH 1.5 solution. Data sets were analyzed using BiaEval Software. In general two independent experiments were performed.
  • CDH3xCD3 bispecific single chain antibody construts according to the invention showed high affinities to human CDH3 in the 1-digit nanomolar range. Binding to macaque CDH3 was balanced, also showing affinities in similar ranges. The affinity values as well as the calculated affinity gap are shown in Table 2. CDH3-25 ⁇ F12q-HALB and CDH3-13- xl2C-HLE (Fc) were each measured in a separate assay and were shown to have
  • affinities of CDH3xCD3 bispecific single chain antibody constructs to CHO cells transfected with human or macaque CDH3 were also determined by Scatchard analysis as the most reliable method for measuring potential affinity gaps between human and macaque CDH3.
  • Scatchard analysis saturation binding experiments are performed using a monovalent detection system to precisely determine monovalent binding of the CDH3xCD3 bispecific antibodies to the respective cell line.
  • 2 ⁇ 104 cells of the respective cell line (recombinantly human CDH3-expressing CHO cell line, recombinantly macaque CDH3-expressing CHO cell line) were incubated each with 50 ⁇ l of a triplet dilution series (twelve dilutions at 1:2) of the respective CDH3xCD3 bispecific antibody (until saturation is reached) starting at 10-20 nM followed by 16 h incubation at 4°C under agitation and one residual washing step. Then, the cells were incubated for another hour with 30 ⁇ l of a CD3xALEXA488 conjugate solution.
  • the cells were resuspended in 150 ⁇ l FACS buffer containing 3.5 % formaldehyde, incubated for further 15 min, centrifuged, resuspended in FACS buffer and analyzed using a FACS Cantoll machine and FACS Diva software. Data were generated from two independent sets of experiments, each using triplicates. Respective Scatchard analysis was calculated to extrapolate maximal binding (Bmax). The concentrations of CDH3xCD3 bispecific antibodies at half-maximal binding were determined reflecting the respective KDs. Values of triplicate measurements were plotted as hyperbolic curves and as S-shaped curves to demonstrate proper concentration ranges from minimal to optimal binding.
  • CDH3xCD3 bispecific antibodies of the invention are nanomolar to subnanomolar in affinity to human CDH3 and present with a small cyno/human interspecies CDH3 affinity gap of around 1.
  • CDH3-25 ⁇ F12q-HALB and CDH3-13 ⁇ I2C-HLE (Fc) were each measured in a separate assay and were shown to have
  • murine CDH3 transfected CHO cells were used as negative control.
  • the results are shown in Figure 5A and 5B .
  • the CDH3xCD3 bispecific single chain antibody constructs of the invention stained CHO cells transfected with human CDH3 and with cyno CDH3, and they also stained the human CDH3 positive epidermoid carcinoma cell line A431 (natural expresser) as well as human and cyno T cells expressing CD3. Moreover, there was no staining of the negative control cells (murine CDH3 transfected CHO).
  • CDH1 E-Cadherin
  • CDH2 N-Cadherin
  • CDH4 R-Cadherin
  • CDH5 VE-Cadherin
  • Antibodies were R&D MAB18381 (for CDH1), eBioscience 12-3259-41 (for CDH2), R&D Systems polyclonal AF2217 (for CDH4) and BD Bioscience # 555661 (for CDH5).
  • sequences of the paralogues as used in the present Example are identified in the sequence listing (SEQ ID Nos: 41-44). They can also be found in the following GenBank, accession numbers:
  • CDH4 sequence was obtained from Ensembl Genome Browser (ENSMMUT00000017252) and fused N-terminal in frame with the human CDH4 signal peptide (amino acids 1-19).
  • the CDH3 binders of the invention were aligned as follows: Full VL including all CDRs was aligned; full VH including CDRs 1 and 2 but except CDR3 was aligned against human antibody germline genes (Vbase). More details can be found in the specification of this application.
  • Table 4 Identity of VH and VL to human germline CDH3xCD3 bispecific antibody Identity of VH and VL to human germline [%] CDH3-11 92.7 CDH3-12 93.6 CDH3-13 87.8 CDH3-14 94.1 CDH3-24 89.4 CDH3-25 89.8 CDH3-26 89.8 CDH3-27 90.7
  • Stimulated T cells enriched for CD8 + T cells were obtained as described in the following.
  • a petri dish (145 mm diameter, Greiner bio-one GmbH, Kremsmünster) was coated with a commercially available anti-CD3 specific antibody (OKT3, Orthoclone) in a final concentration of 1 ⁇ g/ml for 1 hour at 37°C. Unbound protein was removed by one washing step with PBS.
  • 3 - 5 ⁇ 10 7 human PBMC were added to the precoated petri dish in 120 ml of RPMI 1640 with stabilized glutamine / 10% FCS / IL-2 20 U/ml (Proleukin ® , Chiron) and stimulated for 2 days.
  • CD8 + cytotoxic T lymphocytes were enriched by depletion of CD4 + T cells and CD56 + NK cells using Dynal-Beads according to the manufacturer's protocol.
  • Cyno CDH3- or human CDH3-transfected CHO target cells were washed twice with PBS and labeled with 11.1 MBq 51 Cr in a final volume of 100 ⁇ l RPMI with 50% FCS for 60 minutes at 37°C. Subsequently, the labeled target cells were washed 3 times with 5 ml RPMI and then used in the cytotoxicity assay.
  • the assay was performed in a 96-well plate in a total volume of 200 ⁇ l supplemented RPMI with an E:T ratio of 10:1. A starting concentration of 0.01 - 1 ⁇ g/ml of purified bispecific antibody and threefold dilutions thereof were used. Incubation time for the assay was 18 hours.
  • Cytotoxicity was determined as relative values of released chromium in the supernatant relative to the difference of maximum lysis (addition of Triton-X) and spontaneous lysis (without effector cells). All measurements were carried out in quadruplicates. Measurement of chromium activity in the supernatants was performed in a Wizard 3" gamma counter (Perkin Elmer Life Sciences GmbH, GmbH, Germany). Analysis of the results was carried out with Prism 5 for Windows (version 5.0, GraphPad Software Inc., San Diego, California, USA). EC50 values calculated by the analysis program from the sigmoidal dose response curves were used for comparison of cytotoxic activity.
  • the cytotoxic activity of CDH3xCD3 bispecific single chain antibody constructs according to the invention was analyzed in a 51-chromium ( 51 Cr) release cytotoxicity assay using CHO cells transfected with human CDH3 as target cells, and stimulated human CD8+ T cells as effector cells. The experiment was carried out as described in Example 8.1.
  • the results are shown in Figure 6 and Table 5.
  • the CDH3xCD3 bispecific single chain antibody constructs showed potent cytotoxic activity against human CDH3 transfected CHO cells, even down to the 1-digit picomolar range.
  • the claimed single chain antibody constructs - which are specific for the epitope cluster corresponding to positions 291-363 of human CDH3 - present with a favorable epitope-activity relationship supporting potent bispecific antibody mediated cytotoxic activity.
  • CDH3-25 ⁇ F12q-HALB and CDH3-13 xI2C-HLE (Fc) were each measured in a separate assay and were shown to have an EC50 of 3.6 pM and 8.9 pM, respectively.
  • CDH3xCD3 bispecific single chain antibody constructs analyzed in a 51-chromium ( 51 Cr) release cytotoxicity assay using CHO cells transfected with human CDH3 as target cells, and stimulated human CD8 T cells as effector cells.
  • CDH3xCD3 bispecific antibody EC50 [pg/ml] CDH3-11 76 CDH3-12 370 CDH3-13 7.2 CDH3-14 138 CDH3-24 14 CDH3-25 4.9 CDH3-26 21 CDH3-27 61
  • the cytotoxic activity of CDH3xCD3 bispecific single chain antibody constructs was analyzed in a 51-chromium ( 51 Cr) release cytotoxicity assay using the CDH3-positive human epidermoid carcinoma cell line A431 as source of target cells, and stimulated human CD8+ T cells as effector cells.
  • the assay was carried out as described in Example 8.1.
  • CDH3xCD3 bispecific single chain antibody constructs of the present invention are also potent in cytotoxic activity against natural expresser target cells ( Figure 7 and Table 6).
  • CDH3-25 ⁇ F12q-HALB and CDH3-13 xI2C-HLE (Fc) were each measured in a separate assay and were shown to have an EC50 of 1.2 pM and 16 pM, respectively.
  • CDH3xCD3 bispecific single chain antibody constructs analyzed in an 18-hour 51-chromium ( 51 Cr) release cytotoxicity assay with the CDH3-positive human carcinoma cell line A431 as source of target cells, and stimulated enriched human CD8 T cells as effector cells.
  • PBMC Human peripheral blood mononuclear cells
  • PBMC Human peripheral blood mononuclear cells
  • Buffy coats enriched lymphocyte preparations
  • Buffy coats were supplied by a local blood bank and PBMC were prepared on the same day of blood collection.
  • erythrocytes were removed from PBMC via incubation with erythrocyte lysis buffer (155 mM NH 4 Cl, 10 mM KHCO 3 , 100 ⁇ M EDTA). Platelets were removed via the supernatant upon centrifugation of PBMC at 100 ⁇ g.
  • Remaining lymphocytes mainly encompass B and T lymphocytes, NK cells and monocytes.
  • PBMC were kept in culture at 37°C/5% CO 2 in RPMI medium (Gibco) with 10% FCS (Gibco).
  • CD14 MicroBeads and CD56 MicroBeads (20 ⁇ L/10 7 cells) were added and incubated for 15 min at 4 - 8°C. The cells were washed with MACS isolation buffer (1 - 2 mL/10 7 cells). After centrifugation (see above), supernatant was discarded and cells resuspended in MACS isolation buffer (500 ⁇ L/10 8 cells). CD14/CD56 negative cells were then isolated using LS Columns (Miltenyi Biotec, #130-042-401). PBMC w/o CD14+/CD56+ cells were cultured in RPMI complete medium i.e.
  • RPMI1640 Biochrom AG, #FG1215) supplemented with 10% FBS (Biochrom AG, #S0115), 1x non-essential amino acids (Biochrom AG, #K0293), 10 mM Hepes buffer (Biochrom AG, #L1613), 1 mM sodium pyruvate (Biochrom AG, #L0473) and 100 U/mL penicillin/streptomycin (Biochrom AG, #A2213) at 37°C in an incubator until needed.
  • FBS Biochrom AG, #S0115
  • 1x non-essential amino acids Biochrom AG, #K0293
  • 10 mM Hepes buffer Biochrom AG, #L1613
  • 1 mM sodium pyruvate Biochrom AG, #L0473
  • 100 U/mL penicillin/streptomycin Biochrom AG, #A2213
  • the fluorescent membrane dye DiOC 18 (DiO) (Molecular Probes, #V22886) was used to label human CDH3- or macaque CDH3-transfected CHO cells as target cells and distinguish them from effector cells. Briefly, cells were harvested, washed once with PBS and adjusted to 10 6 cell/mL in PBS containing 2 % (v/v) FBS and the membrane dye DiO (5 ⁇ L/10 6 cells). After incubation for 3 min at 37°C, cells were washed twice in complete RPMI medium and the cell number adjusted to 1.25 ⁇ 10 5 cells/mL. The vitality of cells was determined using 0.5 % (v/v) isotonic EosinG solution (Roth, #45380).
  • This assay was designed to quantify the lysis of cyno or human CDH3-transfected CHO cells in the presence of serial dilutions of CDH3 bispecific single chain antibody constructs .
  • Equal volumes of DiO-labeled target cells and effector cells i.e., PBMC w/o CD14 + cells
  • E:T cell ratio 10:1.
  • 160 ⁇ l of this suspension were transferred to each well of a 96-well plate.
  • 40 ⁇ L of serial dilutions of the CDH3xCD3 bispecific single chain antibody constructs and a negative control bispecific (an CD3-based bispecific antibody recognizing an irrelevant target antigen) or RPMI complete medium as an additional negative control were added.
  • PI propidium iodide
  • the cytotoxic activity of CDH3xCD3 bispecific single chain antibody constructs was analyzed in a FACS-based cytotoxicity assay using CHO cells transfected with human CDH3 as target cells, and unstimulated human PBMC as effector cells.
  • the assay was carried out as described in Example 8.4 above.
  • the cytotoxic activity of CDH3xCD3 bispecific single chain antibody constructs was furthermore analyzed in a FACS-based cytotoxicity assay using the CDH3-positive human epidermoid carcinoma cell line A431 as a source of target cells and unstimulated human PBMC as effector cells.
  • the assay was carried out as described in Example 8.4 above. The results are shown in Figure 9 and Table 8.
  • CDH3-25 ⁇ F12q-HALB and CDH3-13 xI2C-HLE (Fc) were each measured in a separate assay and were shown to have an EC50 of 2.3 pM and 32 pM, respectively.
  • Table 8 EC50 values [pg/ml] of CDH3xCD3 bispecific single chain antibody constructs oas measured in a 48-hour FACS-based cytotoxicity assay with unstimulated human PBMC as effector cells and the human A431 cell line as source of target cells.
  • EC50 values were generally higher in cytotoxicity assays with unstimulated PBMC as effector cells compared with cytotoxicity assays using stimulated human CD8+ T cells.
  • cytotoxic activity of CDH3xCD3 bispecific single chain antibody constructs was analyzed in a FACS-based cytotoxicity assay using CHO cells transfected with macaque (cyno) CDH3 as target cells, and a macaque T cell line as source of effector cells.
  • the macaque T cell line 4119LnPx Knappe et al. Blood 95:3256-61 (2000 ) was used as source of effector cells.
  • Target cell labeling of macaque CDH3-transfected CHO cells and flow cytometry based analysis of cytotoxic activity was performed as described above.
  • Macaque T cells from cell line 4119LnPx were induced to efficiently kill macaque CDH3-transfected CHO cells by CDH3xCD3 bispecific single chain antibody constructs of the invention, i.e., single chain antibody constructs which bind to an epitope cluster of human CDH3 corresponding to positions 291-363 of human CDH3 and encompassing the neighboring sub-domains D2C (positions 291-327) and D3A (positions 328-363).
  • the single chain antibody constructs presented potently with 2-digit to very low 4-digit pg/ml EC50-values in this assay, confirming that these single chain antibody constructs are very active in the macaque system.
  • CDH3xCD3 bispecific antibodies of this group although potent in cytotoxic activity against CHO cells transfected with human CDH3 - proved to exhibit a very weak cytotoxic activity against the macaque CDH3-transfected CHO cells (see Figure 10C and Table 9).
  • Bispecific antibodies of this group showed a significantly weaker potency with EC50-values in the very high 4-digit and even in the 5-digit pg/ml range.
  • CDH3-25 ⁇ F12q-HALB and CDH3-13 xI2C-HLE (Fc) were each measured in a separate assay and were shown to have an EC50 of 1.4 pM and 4.0 pM, respectively.
  • CDH3xCD3 bispecific single chain antibody constructs of the invention which bind to an epitope cluster of CDH3 corresponding to positions 291-363 are hence about 5 to almost 1000 times more potent in the macaque system than the antibodies which bind to the extracellular domain D1, and more specifically, to the CDH3 sub-domain D1B.
  • Bispecific CDH3xCD3 antibody monomer were subjected to different stress conditions followed by high performance SEC to determine the percentage of initially monomeric antibody, which had been converted into antibody dimer.
  • Column equilibration and running buffer consisted of 100 mM KH2PO4 - 200 mM Na2SO4 adjusted to pH 6.6.
  • the antibody solution (15 ⁇ g protein) was applied to the equilibrated column and elution was carried out at a flow rate of 0.75 ml/min at a maximum pressure of 7 MPa.
  • the whole run was monitored at 280, 254 and 210 nm optical absorbance. Analysis was done by peak integration of the 210 nm signal recorded in the ⁇ kta Unicorn software run evaluation sheet. Dimer content was calculated by dividing the area of the dimer peak by the total area of monomer plus dimer peak.
  • the results are shown in Table 10 below.
  • the dimer conversion rates of CDH3xCD3 bispecific single chain antibody constructs of the epitope cluster / extracellular sub-domain D3A reached values of ⁇ 2%, and more precisely between 0.2 and 1.8, which is considered good.
  • CDH3-25 ⁇ F12q-HALB and CDH3-13 ⁇ I2C-HLE (Fc) were each measured in a separate assay and were shown to have a percentage of dimer after three freeze/thaw cycles of 1.1 and 0.84, respectively, and a percentage of dimer after 7 days of incubation of 0.0 (both HLE constructs).
  • Table 10 Percentage of monomeric versus dimeric CDH3xCD3 bispecific single chain antibody constructs as determined by High Performance Size Exclusion Chromatography (HP-SEC).
  • CDH3 ⁇ CD3 antibody Percentage of dimer after three freeze/thaw cycles Percentage of dimer after 7 days of incubation
  • Antibody aggregation temperature was determined as follows: 40 ⁇ l of antibody solution at 250 ⁇ g/ml were transferred into a single use cuvette and placed in a Wyatt Dynamic Light Scattering device DynaPro Nanostar (Wyatt). The sample was heated from 40°C to 70°C at a heating rate of 0.5°C/min with constant acquisition of the measured radius. Increase of radius indicating melting of the protein and aggregation was used by the software package delivered with the DLS device to calculate the aggregation temperature of the antibody.
  • CDH3xCD3 bispecific single chain antibody constructs of the invention showed very favorable thermal stability with aggregation temperatures above 54°C, as shown in Table 11 below.
  • CDH3-25 ⁇ F12q-HALB was measured in a separate assay and was shown to have a thermostability of 56.3°C.
  • Table 11 Thermostability of the bispecific single chain antibody constructs as determined by DLS (dynamic light scattering) CDH3xCD3 bispecific antibody Thermostability (DLS °C aggregation) CDH3-11 59.8 CDH3-12 55.9 CDH3-13 59.6 CDH3-14 59.6 CDH3-24 55.1 CDH3-25 55.4 CDH3-26 54.9 CDH3-27 54.1
  • Table 13 Turbidity of the antibody after concentration to 2.5 mg/ml over night CDH3xCD3 bispecific antibody Turbidity at 2500 ⁇ g/ml CDH3-11 0.035 CDH3-12 0.025 CDH3-13 0.030 CDH3-14 0.025 CDH3-24 0.019 CDH3-25 0.026 CDH3-26 0.028 CDH3-27 0.022
  • Tumors were measured by caliper during the study and progress evaluated by intergroup comparison of tumor volumes (TV).
  • the assay was carried out in female NOD/SCID mice subcutaneously injected with human HCT-116 colon carcinoma cells. Effector cells were in vitro expanded and activated human CD3 + T cells (day 12). Treatment was started when tumors had reached a volume of ⁇ 200 mm 3 (day 17).
  • the control group was a q5d vehicle-treated group with T cells.
  • the antibody having SEQ ID NO: 425 was administered at concentrations of 5 mg/kg/admin (group 2) and 0.5 mg/kg/admin (group 3) every five days (q5d) via intravenous bolus injections.
  • the results are shown in Figures 12A and 12B . In particular, Figure 12B differentiates the result in terms of responding animals (7/10) and non-responding animals (3/10).
  • Figure 12B shows that administration of the half-life extended bispecific construct at a concentration of 5 mg/kg to responding animals leads to a discontinuation of tumor growth starting from the moment of the antibody administration.
  • Isolated PBMC from healthy human donors were cultured with increasing concentrations of CDH3-13xI2C or CDH3-13xI2C-HALB bispecific antibody constructs for 48 h (serial dilutions of 0.001 pM-20 ⁇ M).
  • the expression of the activation marker CD69 on CD4+ and CD8+ T cells was determined by immunostaining and flow cytometry and antigen specific conjugates mAb. The results are shown in Figure 13 and discussed herein above.
  • mice received an i.v. infusion for 60 minutes with 0.015 mg/kg of a half-life extended bispecific antibody construct (admin. volume 1 ml/kg) in buffer.
  • the three HLE formats tested were P156, HALB, and HALB variant 1 (see SEQ ID NOs: 437, 443, and 444), each one fused to the C terminus of the construct.
  • the calculated half-life of these HLE constructs in the cyno model was 57 hours, 63-85 hours and 68 hours, respectively.

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Publication number Priority date Publication date Assignee Title
CN102164961B (zh) * 2008-10-01 2014-04-16 安进研发（慕尼黑）股份有限公司 种间特异性PSCAxCD3、CD19xCD3、C-METxCD3、内皮唾液酸蛋白xCD3、EpCAMxCD3、IGF-1RxCD3或FAPαxCD3双特异性单链抗体
TWI829617B (zh) 2015-07-31 2024-01-21 德商安美基研究（慕尼黑）公司 Ｆｌｔ３及ｃｄ３抗體構築體
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EA039859B1 (ru) 2016-02-03 2022-03-21 Эмджен Рисерч (Мюник) Гмбх Биспецифические конструкты антител, связывающие egfrviii и cd3
MD3411402T2 (ro) 2016-02-03 2022-05-31 Amgen Res Munich Gmbh Constructe de anticorpi bispecifici BCMA și CD3 de angajare a celulei T
JOP20190189A1 (ar) * 2017-02-02 2019-08-01 Amgen Res Munich Gmbh تركيبة صيدلانية ذات درجة حموضة منخفضة تتضمن بنيات جسم مضاد يستهدف الخلية t
WO2018222675A1 (en) 2017-05-30 2018-12-06 The Board Of Regents Of The University Of Oklahoma Anti-doublecortin-like kinase 1 antibodies and methods of use
US20210363272A1 (en) * 2017-12-04 2021-11-25 COARE Holdings, Inc Anti-dclk1 antibodies and chimeric antigen receptors, and compositions and methods of use thereof
UY38041A (es) * 2017-12-29 2019-06-28 Amgen Inc Construcción de anticuerpo biespecífico dirigida a muc17 y cd3
EP3740505A1 (en) * 2018-01-16 2020-11-25 Lakepharma Inc. Bispecific antibody that binds cd3 and another target
US20210002365A1 (en) * 2018-02-14 2021-01-07 Yale University Compositions for modulation of a trem or treml protein and methods of use
TW202031683A (zh) * 2018-11-09 2020-09-01 新加坡商優其洛伊生物私人有限公司 介白素2受體β(IL2Rβ)/共同γ鏈抗體
EP3973000A4 (en) * 2019-06-07 2023-09-06 Adimab, LLC HIGH AFFINITY ANTI-CD3 ANTIBODIES AND METHODS OF GENERATION AND USE THEREOF
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008143954A2 (en) * 2007-05-14 2008-11-27 Biogen Idec Ma Inc. Single-chain fc (scfc) regions, binding polypeptides comprising same, and methods related thereto
WO2017008169A1 (en) * 2015-07-15 2017-01-19 Zymeworks Inc. Drug-conjugated bi-specific antigen-binding constructs

Family Cites Families (185)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5013A (en) 1847-03-13 Improvement in apparatus for the manufacture of malleable iron
US462837A (en) 1891-11-10 Indicating device for water-tanks
US4447A (en) 1846-04-04 Car- wheel
US233A (en) 1837-06-14 Improvement in plows
US556A (en) 1838-01-09 Machine foe
US3180193A (en) 1963-02-25 1965-04-27 Benedict David Machines for cutting lengths of strip material
US3773919A (en) 1969-10-23 1973-11-20 Du Pont Polylactide-drug mixtures
US3691016A (en) 1970-04-17 1972-09-12 Monsanto Co Process for the preparation of insoluble enzymes
CA1023287A (en) 1972-12-08 1977-12-27 Boehringer Mannheim G.M.B.H. Process for the preparation of carrier-bound proteins
US4179337A (en) 1973-07-20 1979-12-18 Davis Frank F Non-immunogenic polypeptides
US4195128A (en) 1976-05-03 1980-03-25 Bayer Aktiengesellschaft Polymeric carrier bound ligands
US4330440A (en) 1977-02-08 1982-05-18 Development Finance Corporation Of New Zealand Activated matrix and method of activation
CA1093991A (en) 1977-02-17 1981-01-20 Hideo Hirohara Enzyme immobilization with pullulan gel
US4229537A (en) 1978-02-09 1980-10-21 New York University Preparation of trichloro-s-triazine activated supports for coupling ligands
US4263428A (en) 1978-03-24 1981-04-21 The Regents Of The University Of California Bis-anthracycline nucleic acid function inhibitors and improved method for administering the same
JPS6023084B2 (ja) 1979-07-11 1985-06-05 味の素株式会社 代用血液
IE52535B1 (en) 1981-02-16 1987-12-09 Ici Plc Continuous release pharmaceutical compositions
US4475196A (en) 1981-03-06 1984-10-02 Zor Clair G Instrument for locating faults in aircraft passenger reading light and attendant call control system
US4447233A (en) 1981-04-10 1984-05-08 Parker-Hannifin Corporation Medication infusion pump
US4485045A (en) 1981-07-06 1984-11-27 Research Corporation Synthetic phosphatidyl cholines useful in forming liposomes
US4640835A (en) 1981-10-30 1987-02-03 Nippon Chemiphar Company, Ltd. Plasminogen activator derivatives
EP0088046B1 (de) 1982-02-17 1987-12-09 Ciba-Geigy Ag Lipide in wässriger Phase
US4439196A (en) 1982-03-18 1984-03-27 Merck & Co., Inc. Osmotic drug delivery system
JPS58166634A (ja) 1982-03-29 1983-10-01 Toshiba Corp 有機溶媒電池用正極
JPS58166633A (ja) 1982-03-29 1983-10-01 Toshiba Corp 有機溶媒電池用正極
US4447224A (en) 1982-09-20 1984-05-08 Infusaid Corporation Variable flow implantable infusion apparatus
US4487603A (en) 1982-11-26 1984-12-11 Cordis Corporation Implantable microinfusion pump system
GB8308235D0 (en) 1983-03-25 1983-05-05 Celltech Ltd Polypeptides
US4816567A (en) 1983-04-08 1989-03-28 Genentech, Inc. Recombinant immunoglobin preparations
US4486194A (en) 1983-06-08 1984-12-04 James Ferrara Therapeutic device for administering medicaments through the skin
US4544545A (en) 1983-06-20 1985-10-01 Trustees University Of Massachusetts Liposomes containing modified cholesterol for organ targeting
HUT35524A (en) 1983-08-02 1985-07-29 Hoechst Ag Process for preparing pharmaceutical compositions containing regulatory /regulative/ peptides providing for the retarded release of the active substance
EP0143949B1 (en) 1983-11-01 1988-10-12 TERUMO KABUSHIKI KAISHA trading as TERUMO CORPORATION Pharmaceutical composition containing urokinase
US4496689A (en) 1983-12-27 1985-01-29 Miles Laboratories, Inc. Covalently attached complex of alpha-1-proteinase inhibitor with a water soluble polymer
JPS6147500A (ja) 1984-08-15 1986-03-07 Res Dev Corp Of Japan キメラモノクロ−ナル抗体及びその製造法
EP0173494A3 (en) 1984-08-27 1987-11-25 The Board Of Trustees Of The Leland Stanford Junior University Chimeric receptors by dna splicing and expression
GB8422238D0 (en) 1984-09-03 1984-10-10 Neuberger M S Chimeric proteins
US4879231A (en) 1984-10-30 1989-11-07 Phillips Petroleum Company Transformation of yeasts of the genus pichia
US4596556A (en) 1985-03-25 1986-06-24 Bioject, Inc. Hypodermic injection apparatus
US4751180A (en) 1985-03-28 1988-06-14 Chiron Corporation Expression using fused genes providing for protein product
DE3675588D1 (de) 1985-06-19 1990-12-20 Ajinomoto Kk Haemoglobin, das an ein poly(alkenylenoxid) gebunden ist.
US4935233A (en) 1985-12-02 1990-06-19 G. D. Searle And Company Covalently linked polypeptide cell modulators
JPS62170639A (ja) 1986-01-22 1987-07-27 株式会社システムメンテナンス 防蟻板の取付け工法
JPS63502716A (ja) 1986-03-07 1988-10-13 マサチューセッツ・インステチュート・オブ・テクノロジー 糖タンパク安定性の強化方法
US5225539A (en) 1986-03-27 1993-07-06 Medical Research Council Recombinant altered antibodies and methods of making altered antibodies
GB8607679D0 (en) 1986-03-27 1986-04-30 Winter G P Recombinant dna product
GB8610600D0 (en) 1986-04-30 1986-06-04 Novo Industri As Transformation of trichoderma
US4791192A (en) 1986-06-26 1988-12-13 Takeda Chemical Industries, Ltd. Chemically modified protein with polyethyleneglycol
US4946778A (en) 1987-09-21 1990-08-07 Genex Corporation Single polypeptide chain binding molecules
AU600575B2 (en) 1987-03-18 1990-08-16 Sb2, Inc. Altered antibodies
WO1988009344A1 (en) 1987-05-21 1988-12-01 Creative Biomolecules, Inc. Targeted multifunctional proteins
US4790824A (en) 1987-06-19 1988-12-13 Bioject, Inc. Non-invasive hypodermic injection device
US4941880A (en) 1987-06-19 1990-07-17 Bioject, Inc. Pre-filled ampule and non-invasive hypodermic injection device assembly
ATE108965T1 (de) 1987-12-09 1994-08-15 Omron Tateisi Electronics Co Induktives datenübertragungssystem.
US5476996A (en) 1988-06-14 1995-12-19 Lidak Pharmaceuticals Human immune system in non-human animal
US5223409A (en) 1988-09-02 1993-06-29 Protein Engineering Corp. Directed evolution of novel binding proteins
GB8823869D0 (en) 1988-10-12 1988-11-16 Medical Res Council Production of antibodies
US5175384A (en) 1988-12-05 1992-12-29 Genpharm International Transgenic mice depleted in mature t-cells and methods for making transgenic mice
US5530101A (en) 1988-12-28 1996-06-25 Protein Design Labs, Inc. Humanized immunoglobulins
EP0402226A1 (en) 1989-06-06 1990-12-12 Institut National De La Recherche Agronomique Transformation vectors for yeast yarrowia
US5683888A (en) 1989-07-22 1997-11-04 University Of Wales College Of Medicine Modified bioluminescent proteins and their use
US5013556A (en) 1989-10-20 1991-05-07 Liposome Technology, Inc. Liposomes with enhanced circulation time
US5064413A (en) 1989-11-09 1991-11-12 Bioject, Inc. Needleless hypodermic injection device
US5312335A (en) 1989-11-09 1994-05-17 Bioject Inc. Needleless hypodermic injection device
US5859205A (en) 1989-12-21 1999-01-12 Celltech Limited Humanised antibodies
US5292658A (en) 1989-12-29 1994-03-08 University Of Georgia Research Foundation, Inc. Boyd Graduate Studies Research Center Cloning and expressions of Renilla luciferase
US6673986B1 (en) 1990-01-12 2004-01-06 Abgenix, Inc. Generation of xenogeneic antibodies
SG48759A1 (en) 1990-01-12 2002-07-23 Abgenix Inc Generation of xenogenic antibodies
US6075181A (en) 1990-01-12 2000-06-13 Abgenix, Inc. Human antibodies derived from immunized xenomice
US6150584A (en) 1990-01-12 2000-11-21 Abgenix, Inc. Human antibodies derived from immunized xenomice
FR2664073A1 (fr) 1990-06-29 1992-01-03 Thomson Csf Moyens de marquage d'objets, procede de realisation et dispositif de lecture.
US5545806A (en) 1990-08-29 1996-08-13 Genpharm International, Inc. Ransgenic non-human animals for producing heterologous antibodies
US5874299A (en) 1990-08-29 1999-02-23 Genpharm International, Inc. Transgenic non-human animals capable of producing heterologous antibodies
US5877397A (en) 1990-08-29 1999-03-02 Genpharm International Inc. Transgenic non-human animals capable of producing heterologous antibodies of various isotypes
ATE352612T1 (de) 1990-08-29 2007-02-15 Pharming Intellectual Pty Bv Homologe rekombination in säugetier-zellen
US5661016A (en) 1990-08-29 1997-08-26 Genpharm International Inc. Transgenic non-human animals capable of producing heterologous antibodies of various isotypes
US5770429A (en) 1990-08-29 1998-06-23 Genpharm International, Inc. Transgenic non-human animals capable of producing heterologous antibodies
US6255458B1 (en) 1990-08-29 2001-07-03 Genpharm International High affinity human antibodies and human antibodies against digoxin
US5625126A (en) 1990-08-29 1997-04-29 Genpharm International, Inc. Transgenic non-human animals for producing heterologous antibodies
US5633425A (en) 1990-08-29 1997-05-27 Genpharm International, Inc. Transgenic non-human animals capable of producing heterologous antibodies
US5814318A (en) 1990-08-29 1998-09-29 Genpharm International Inc. Transgenic non-human animals for producing heterologous antibodies
US5789650A (en) 1990-08-29 1998-08-04 Genpharm International, Inc. Transgenic non-human animals for producing heterologous antibodies
US6300129B1 (en) 1990-08-29 2001-10-09 Genpharm International Transgenic non-human animals for producing heterologous antibodies
EP0546073B1 (en) 1990-08-29 1997-09-10 GenPharm International, Inc. production and use of transgenic non-human animals capable of producing heterologous antibodies
WO1992015673A1 (en) 1991-03-11 1992-09-17 The University Of Georgia Research Foundation, Inc. Cloning and expression of renilla luciferase
WO1992022670A1 (en) 1991-06-12 1992-12-23 Genpharm International, Inc. Early detection of transgenic embryos
WO1992022645A1 (en) 1991-06-14 1992-12-23 Genpharm International, Inc. Transgenic immunodeficient non-human animals
US6407213B1 (en) 1991-06-14 2002-06-18 Genentech, Inc. Method for making humanized antibodies
WO1993004169A1 (en) 1991-08-20 1993-03-04 Genpharm International, Inc. Gene targeting in animal cells using isogenic dna constructs
US5565332A (en) 1991-09-23 1996-10-15 Medical Research Council Production of chimeric antibodies - a combinatorial approach
AU3328493A (en) 1991-12-17 1993-07-19 Genpharm International, Inc. Transgenic non-human animals capable of producing heterologous antibodies
WO1993015722A1 (en) 1992-02-07 1993-08-19 Syntex (Usa) Inc. Controlled delivery of pharmaceuticals from preformed porous microparticles
AU4541093A (en) 1992-06-18 1994-01-24 Genpharm International, Inc. Methods for producing transgenic non-human animals harboring a yeast artificial chromosome
US5383851A (en) 1992-07-24 1995-01-24 Bioject Inc. Needleless hypodermic injection device
AU675661B2 (en) 1992-07-24 1997-02-13 Abgenix, Inc. Generation of xenogeneic antibodies
PT672141E (pt) 1992-10-23 2003-09-30 Immunex Corp Metodos de preparacao de proteinas oligomericas soluveis
US5981175A (en) 1993-01-07 1999-11-09 Genpharm Internation, Inc. Methods for producing recombinant mammalian cells harboring a yeast artificial chromosome
JPH08509612A (ja) 1993-04-26 1996-10-15 ジェンファーム インターナショナル インコーポレイテッド 異種抗体を産生することができるトランスジェニック非ヒト動物
ATE400651T1 (de) 1993-09-10 2008-07-15 Univ Columbia Verwendung von grünem fluoreszenzprotein
US5625825A (en) 1993-10-21 1997-04-29 Lsi Logic Corporation Random number generating apparatus for an interface unit of a carrier sense with multiple access and collision detect (CSMA/CD) ethernet data network
WO1995021191A1 (en) 1994-02-04 1995-08-10 William Ward Bioluminescent indicator based upon the expression of a gene for a modified green-fluorescent protein
US5643763A (en) 1994-11-04 1997-07-01 Genpharm International, Inc. Method for making recombinant yeast artificial chromosomes by minimizing diploid doubling during mating
US6214388B1 (en) 1994-11-09 2001-04-10 The Regents Of The University Of California Immunoliposomes that optimize internalization into target cells
US5777079A (en) 1994-11-10 1998-07-07 The Regents Of The University Of California Modified green fluorescent proteins
EP1978033A3 (en) 1995-04-27 2008-12-24 Amgen Fremont Inc. Human antibodies derived from immunized xenomice
CA2219486A1 (en) 1995-04-28 1996-10-31 Abgenix, Inc. Human antibodies derived from immunized xenomice
US5811524A (en) 1995-06-07 1998-09-22 Idec Pharmaceuticals Corporation Neutralizing high affinity human monoclonal antibodies specific to RSV F-protein and methods for their manufacture and therapeutic use thereof
ES2176484T3 (es) 1995-08-18 2002-12-01 Morphosys Ag Bancos de proteinas/(poli)peptidos.
KR100308764B1 (ko) 1995-08-29 2001-12-17 마나배게이사꾸 키메라동물및그의제작법
US5874304A (en) 1996-01-18 1999-02-23 University Of Florida Research Foundation, Inc. Humanized green fluorescent protein genes and methods
US5804387A (en) 1996-02-01 1998-09-08 The Board Of Trustees Of The Leland Stanford Junior University FACS-optimized mutants of the green fluorescent protein (GFP)
US5876995A (en) 1996-02-06 1999-03-02 Bryan; Bruce Bioluminescent novelty items
US5925558A (en) 1996-07-16 1999-07-20 The Regents Of The University Of California Assays for protein kinases using fluorescent protein substrates
US5976796A (en) 1996-10-04 1999-11-02 Loma Linda University Construction and expression of renilla luciferase and green fluorescent protein fusion genes
ES2301183T3 (es) 1996-12-03 2008-06-16 Amgen Fremont Inc. Anticuerpo completamente humano que se une al receptor del egfr.
CA2271717A1 (en) 1996-12-12 1998-06-18 Prolume, Ltd. Apparatus and method for detecting and identifying infectious agents
EP0983303B1 (en) 1997-05-21 2006-03-08 Biovation Limited Method for the production of non-immunogenic proteins
DE59813016D1 (de) 1997-10-15 2005-09-22 Pharis Biotec Gmbh Cadherin derived growth factor und seine verwendung
DE69938293T2 (de) 1998-03-27 2009-03-12 Bruce J. Beverly Hills Bryan Luciferase, gfp fluoreszenzproteine, kodierende nukleinsaüre und ihre verwendung in der diagnose
WO1999054440A1 (en) 1998-04-21 1999-10-28 Micromet Gesellschaft Für Biomedizinische Forschung Mbh CD19xCD3 SPECIFIC POLYPEPTIDES AND USES THEREOF
ES2207278T3 (es) 1998-07-28 2004-05-16 Micromet Ag Heterominicuerpos.
US7254167B2 (en) 1998-10-30 2007-08-07 Broadcom Corporation Constellation-multiplexed transmitter and receiver
WO2000034317A2 (en) 1998-12-08 2000-06-15 Biovation Limited Method for reducing immunogenicity of proteins
US6833268B1 (en) 1999-06-10 2004-12-21 Abgenix, Inc. Transgenic animals for producing specific isotypes of human antibodies via non-cognate switch regions
CA2445611A1 (en) 2001-05-31 2002-12-05 Chiron Corporation P-cadherin as a target for anti-cancer therapy
US7230167B2 (en) 2001-08-31 2007-06-12 Syngenta Participations Ag Modified Cry3A toxins and nucleic acid sequences coding therefor
WO2003047336A2 (en) 2001-11-30 2003-06-12 Abgenix, Inc. TRANSGENIC ANIMALS BEARING HUMAN Igμ LIGHT CHAIN GENES
US8486859B2 (en) 2002-05-15 2013-07-16 Bioenergy, Inc. Use of ribose to enhance plant growth
AU2003304203A1 (en) 2002-10-29 2005-01-04 Pharmacia Corporation Differentially expressed genes involved in cancer, the polypeptides encoded thereby, and methods of using the same
US7904068B2 (en) 2003-06-06 2011-03-08 At&T Intellectual Property I, L.P. System and method for providing integrated voice and data services utilizing wired cordless access with unlicensed spectrum and wired access with licensed spectrum
KR20120125634A (ko) 2003-10-16 2012-11-16 마이크로메트 에이지 다중특이적 탈면역화된 ｃｄ3-바인더
DE602006017460D1 (de) 2005-03-14 2010-11-25 Omron Tateisi Electronics Co Programmierbares Steuersystem
KR101193797B1 (ko) 2005-04-26 2012-10-23 화이자 인코포레이티드 Ｐ-카드헤린 항체
BRPI0611901A2 (pt) 2005-06-14 2012-08-28 Amgen, Inc composição, liofilizado, kit, e, processo para preparar uma composição
US8234145B2 (en) 2005-07-12 2012-07-31 International Business Machines Corporation Automatic computation of validation metrics for global logistics processes
BRPI0604215A (pt) 2005-08-17 2007-04-10 Biosigma Sa método para projetar oligonucleotìdeos para técnicas de biologia molecular
JP5686953B2 (ja) 2005-10-11 2015-03-18 アムゲン リサーチ （ミュンヘン） ゲーエムベーハー 交差種特異的（ｃｒｏｓｓ−ｓｐｅｃｉｅｓ−ｓｐｅｃｉｆｉｃ）抗体を含む組成物および該組成物の使用
JP2007122396A (ja) 2005-10-27 2007-05-17 Hitachi Ltd ディスクアレイ装置及びその障害対応検証方法
TW200745163A (en) 2006-02-17 2007-12-16 Syntonix Pharmaceuticals Inc Peptides that block the binding of IgG to FcRn
US7919297B2 (en) 2006-02-21 2011-04-05 Cornell Research Foundation, Inc. Mutants of Aspergillus niger PhyA phytase and Aspergillus fumigatus phytase
EP2004687A1 (en) 2006-02-28 2008-12-24 Oncotherapy Science, Inc. Methods for damaging cells using effector functions of anti-cdh3 antibodies
US7574748B2 (en) 2006-03-07 2009-08-18 Nike, Inc. Glove with support system
US7990860B2 (en) 2006-06-16 2011-08-02 Harris Corporation Method and system for rule-based sequencing for QoS
US8430938B1 (en) 2006-07-13 2013-04-30 The United States Of America As Represented By The Secretary Of The Navy Control algorithm for autothermal reformer
KR101146588B1 (ko) 2006-08-11 2012-05-16 삼성전자주식회사 Ｆｉｎ 구조체 및 이를 이용한 핀 트랜지스터의 제조방법
CN100589507C (zh) 2006-10-30 2010-02-10 华为技术有限公司 一种拨号提示系统及方法
US7466008B2 (en) 2007-03-13 2008-12-16 Taiwan Semiconductor Manufacturing Company, Ltd. BiCMOS performance enhancement by mechanical uniaxial strain and methods of manufacture
NZ580755A (en) * 2007-04-03 2012-05-25 Micromet Ag Cross-species-specific cd3-epsilon binding domain
WO2008124858A2 (en) 2007-04-11 2008-10-23 F-Star Biotechnologische Forschungs- Und Entwicklungsges. M.B.H. Targeted receptor
US8209741B2 (en) 2007-09-17 2012-06-26 Microsoft Corporation Human performance in human interactive proofs using partial credit
US8464584B2 (en) 2007-10-19 2013-06-18 Food Equipment Technologies Company, Inc. Beverage dispenser with level measuring apparatus and display
CN101883933B (zh) 2007-11-29 2014-04-23 舍弗勒技术股份两合公司 尤其是用于在驱动机与从动部分之间传递功率的力传递装置
US8376279B2 (en) 2008-01-23 2013-02-19 Aurora Flight Sciences Corporation Inflatable folding wings for a very high altitude aircraft
CA2721202A1 (en) 2008-04-17 2009-10-22 Hilde Adi Pierrette Revets Peptides capable of binding to serum proteins and compounds, constructs and polypeptides comprising the same
WO2010001585A1 (en) * 2008-06-30 2010-01-07 Oncotherapy Science, Inc. Anti-cdh3 antibodies labeled with radioisotope label and uses thereof
EP2352765B1 (en) 2008-10-01 2018-01-03 Amgen Research (Munich) GmbH Cross-species-specific single domain bispecific single chain antibody
WO2010054010A1 (en) 2008-11-07 2010-05-14 Fabrus Llc Anti-dll4 antibodies and uses thereof
CN102341172A (zh) 2009-03-04 2012-02-01 日产自动车株式会社 废气净化催化剂及其制造方法
US8463191B2 (en) 2009-04-02 2013-06-11 Qualcomm Incorporated Beamforming options with partial channel knowledge
CA2760642A1 (en) * 2009-05-01 2010-11-04 The University Of Tokyo Anti-cadherin antibody
RU2607374C2 (ru) 2009-10-30 2017-01-10 Новозаймс Байофарма Дк А/С Варианты альбумина
EP2496600A1 (en) 2009-11-04 2012-09-12 Fabrus LLC Methods for affinity maturation-based antibody optimization
WO2011071541A2 (en) 2009-12-11 2011-06-16 The Scripps Research Institute Cadherin modulatory agents
ES2701626T3 (es) 2009-12-28 2019-02-25 Oncotherapy Science Inc Anticuerpos anti-CDH3 y sus usos
JP2014015396A (ja) 2010-10-29 2014-01-30 Perseus Proteomics Inc 高い親和性を有する抗ｃｄｈ３抗体
US20130225496A1 (en) 2010-11-01 2013-08-29 Novozymes Biopharma Dk A/S Albumin Variants
CN103298648B (zh) 2010-12-30 2016-04-13 C.劳勃.汉默斯坦两合有限公司 适于机动车辆座椅的包括两对导轨的纵向调节装置
EP2699598B1 (en) * 2011-04-19 2019-03-06 Pfizer Inc Combinations of anti-4-1bb antibodies and adcc-inducing antibodies for the treatment of cancer
CN104011072B (zh) 2011-05-05 2018-10-12 阿尔布梅迪克斯医疗有限公司 白蛋白变体
US9127061B2 (en) 2011-06-24 2015-09-08 Perseus Proteomics Inc. Anti-human P-cadherin (CDH3) recombinant antibody
US20130078250A1 (en) 2011-08-23 2013-03-28 Oliver Ast Bispecific t cell activating antigen binding molecules
BR112014003769B1 (pt) 2011-08-23 2022-05-10 Roche Glycart Ag Molécula de ligação ao antígeno biespecífica ativadora de célula t, método de produção da molécula de ligação ao antígeno biespecífica ativadora de célula t, composição farmacêutica e uso da molécula de ligação ao antígeno biespecífica ativadora de célula t
US20140315817A1 (en) 2011-11-18 2014-10-23 Eleven Biotherapeutics, Inc. Variant serum albumin with improved half-life and other properties
PL2825556T3 (pl) 2012-03-16 2018-10-31 Albumedix A/S Warianty albuminy
CA2890766A1 (en) 2012-11-08 2014-05-15 Novozymes Biopharma Dk A/S Albumin variants
US20140308285A1 (en) 2013-03-15 2014-10-16 Amgen Inc. Heterodimeric bispecific antibodies
EP2970484B2 (en) 2013-03-15 2022-09-21 Amgen Inc. Heterodimeric bispecific antibodies
US20140302037A1 (en) 2013-03-15 2014-10-09 Amgen Inc. BISPECIFIC-Fc MOLECULES
JP6071725B2 (ja) 2013-04-23 2017-02-01 カルソニックカンセイ株式会社 電気自動車の駆動力制御装置
EP3733710A1 (en) 2013-09-25 2020-11-04 Amgen, Inc Hetrodimeric v-c-fc-v-c antibody
EP2977296B1 (en) * 2014-01-29 2018-07-18 NSK Ltd. Electric power steering device
US9300829B2 (en) 2014-04-04 2016-03-29 Canon Kabushiki Kaisha Image reading apparatus and correction method thereof
MX2016017393A (es) * 2014-07-01 2017-09-05 Pfizer Diacuerpos heterodimericos biespecificos y sus usos.
US10105142B2 (en) 2014-09-18 2018-10-23 Ethicon Llc Surgical stapler with plurality of cutting elements
US11284893B2 (en) 2019-04-02 2022-03-29 Covidien Lp Stapling device with articulating tool assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008143954A2 (en) * 2007-05-14 2008-11-27 Biogen Idec Ma Inc. Single-chain fc (scfc) regions, binding polypeptides comprising same, and methods related thereto
WO2017008169A1 (en) * 2015-07-15 2017-01-19 Zymeworks Inc. Drug-conjugated bi-specific antigen-binding constructs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CAAVEIRO, J.M.M., KUDO, S., TSUMOTO, K.: "4ZMTCrystal structure of human P-cadherin (ss-X-dimer-long)", 7 September 2016 (2016-09-07), Retrieved from the Internet <URL:https://www.rcsb.org/structure/4ZMT> [retrieved on 20190807] *

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